United States Patent [19]
`Haines et a1.
`
`[11] Patent Number:
`[45] Date of Patent:
`
`5,077,660
`Dec. 31, 1991
`
`[54]
`[75]
`
`[73]
`[21]
`[22]
`[51]
`[521
`[58]
`[56]
`
`REMOTE METER CONFIGURATION
`Inventors: John G. Haines, Oakland; Tracy F.
`Slaughter, Grass Valley; Charles P.
`Barker, Pleasanton, all of Calif.
`Assignee: f.m.e. Corporation, Hayward, Calif.
`Appl. No.: 328,112
`Filed:
`Mar. 23, 1989
`
`Int. Cl.5 ............................................ .. G06F 15/20
`US. Cl. .............................. .. 364/464.02
`Field of Search .................. .. 364/200, 464.02, 900
`References Cited
`U.S. PATENT DOCUMENTS
`
`. . . .. 380/37
`
`3,798,36O 3/1974 Feistel . . . . . . . . .
`
`. . . .. 380/37
`
`3,034,329 5/1962 Pitney C181. ........................ .. 70/314
`gvggg’ggz
`a“??? --------
`~ -
`- - '
`33
`.
`,
`c 1gg1ns eta.
`3,798,359 3/1974 Feistel . . . . .
`.
`340/8531
`3,800,284 3/1974 zucker et a1_ "
`340/3531
`3,360,911 1/1975 Hinman et aL
`, 364/900
`4,097,923 6/1978 Eckert, Jr. et al.
`380/21
`4,182,933 1/1980 Rosenblum .
`235/ 375
`4,222,518 9/1980 simiian
`235/375
`4,226,360 10/1930 sfmljan
`522/375
`4349971 2/1981 S‘m-l‘Fm ------ "
`N00
`' ‘ ' ‘ "
`4’253’158 2/1981 McF'ggans ‘ ' ‘ ' '
`364/900 X
`4,280,180 7/1981 Eckert et a1.
`.... .. 3154/900
`4,302,821 11/1981 Eckert et a1.
`“4/900 X
`4,310,720 V1982 Check’ Jr‘ _____ “
`235/380 X
`4,314,097 2/1932 Campbell, Jr_ _
`4,376,299 3/1983 Rivest ..................... .. 364/900
`4,424,573 1/ 1984 Eckert, Jr. et a].
`364/900
`4,447,890 5/ 1984 Dllwel 6t 81- ---- --
`364/900
`4,481,604 11/1934 Gilham 6‘ 31- ~~
`364/900
`z'4s4'ggz 1¥198g gums 6‘ al
`;$/9%
`’528’
`/ 198
`qderberg e‘ a '
`/9
`4,562,535 12/1985 Vincent et al. .
`364/200
`4,520,144 4/1986 Calvi ................ ..
`101/9307);
`4,636,975 V1987 Soderberg et a1_
`____ “ “4/900
`4,775,246 10/1988 Edelmann et al. .
`380/23
`4,775,931 10/1988 Dickie et a]. ...................... .. 364/200
`
`4,783,745 11/1988 Brookner et a1. ............ .. 364/46402
`
`. . . .. 364/464.02
`4,787,045 11/1988 Storace et a]. . . . . .
`364/46402
`4,812,992 3/1989 Storace et a1. ,
`. 364/464.02
`4,812,994 3/1989 Taylor et a]. .... ..
`4,837,714 6/1989 Brookner eta]. ................. .. 364/550
`
`.
`
`.
`
`.
`
`.
`
`.
`
`.
`
`.
`
`FOREIGN PATENT DOCUMENTS
`2636852 2/1978 Fed. Rep. of Germany .
`Primary Examiner—Parshotam S. Lall
`Assistant Examiner-Edward R. Cosimano
`Attorney, Agent, or Firm-Townsend and Townsend
`[57]
`ABSTRACT
`A technique for recon?guring in the ?eld postage me
`ters having a set of features that may be selectively
`enabled or disabled by software. The technique pro
`vides security so that the meter company
`always
`have a correct record of the con?guration of the meter
`-
`'
`r
`1
`f
`.
`.
`m the ?ak? The meter ‘5 .capab e o. bemg pm In“) a
`configuration mode by suitable entries from the key
`board, in wh1ch mode it is inhibited from printing post
`age. The meter has a storage reg1ster for a current or old
`meter type, and can receive a desired new meter type
`via keyboard entry. The meter generates an encrypted
`con?guration request code that is partially based on the
`values of the old and new meter types. The con?gura
`tion request code, when communicated to the data cen
`ter computer along with other validating identi?cation
`. f0
`t.
`is hecked b the data cent com “ter
`1“ ."m ‘on’
`c
`y
`.
`er
`I’ .
`which generates the con?guration request code usmg
`the same algorithm. If the two values agree, the data
`Center computer generates an encrypted con?guration
`enable code. This is communicated to the meter, which
`receives the computer generated con?guration enable
`code and also generates an internal con?guration enable
`code using the same algorithm as the data center com
`puter. If the con?guration enable codes agree, the meter
`v
`.t
`th M t
`t
`b with th
`W
`° "w" es
`6 0 me er ype “um 6?
`e "e
`meter type number, thereby recon?guring the meter.
`
`.
`
`.
`
`20 Claims, 7 Drawing Sheets
`
`30 /
`
`AGENTOBTNFS oomGuRAnoN
`aeoues'rcooemoumeraa
`
`32 {
`AGENTooNHmscoNHGLBAmN
`necu'esrcooewm-icarm
`COMPUTER AND oeTAms
`oomotmmoumoooe
`
`34 K
`AGEmoomRMscomGuRA'noN
`ENABLECODEWITH METER AND
`MEIERRECONFIGURES
`
`Petitioners Ex. 1005 Page 1
`
`

`

`U.S. Patent
`
`Dec. 31, 1991
`
`Sheet 1 of 7
`
`1o
`\I
`
`14 \
`
`13 \ KEYBOARD
`
`DISPLAY
`
`[16
`f,- BUILT-IN
`oEcooER/oRIvER
`
`X/YVALUE
`
`80's
`
`18
`
`[20
`
`(100K
`
`<__>
`
`24
`
`mm
`
`RAM
`
`v
`
`INTERMEDIATE
`smci
`
`[26
`OLD MTN
`CTID
`STID
`SERIALNO.
`RESETAMOINT
`
`NEW MTN
`
`I
`
`1
`
`I
`-
`ESERVED
`I
`BAM
`
`m
`
`I
`II_
`T
`m |
`
`4
`
`12 \
`
`PR'NT
`I--—-—> MECHANISM
`.
`
`METER
`INTERIOR
`
`oormoR \ \
`‘7
`METER
`Housm
`
`TO MAILING MACHINE
`
`FIG. 1
`
`Petitioners Ex. 1005 Page 2
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 2 of 7
`
`5,077,660
`
`K30
`
`AGENT OBTAINS CONFIGURATION
`REQUEST CODE FROM METER
`
`/4 32
`AGENT CONFIRMS CONFIGURATION
`REQUEST CODE WITH CENTRAL
`COMPUTER AND OBTAINS
`CONFIGURATIW BQABLE CODE
`
`[54
`
`AGENT CONFIRMS CONFIGURATION
`ENABLE CODE WITH METER AND
`METER RECONFIGURES
`
`FIG. 2
`
`Petitioners Ex. 1005 Page 3
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 3 of 7
`
`660
`5,077,
`
`METER
`
`AGENT
`[-42
`r40
`METER ENTERsMOOEBY CHANGING
`sELECT MEIER REMOTE
`CONFIGURATION MOOE ‘—_> MODE REGIsTER
`46
`ENTER NEW J
`MTN
`\
`
`I]!
`MEIER DISPLAYS NEEDED
`INFORMATION
`
`K“
`
`-----_-—> METER sTOREs NEw MTN IN BAM
`
`f‘ 48
`
`NO
`
`52 \
`<— NOTIFYAGENT
`/
`
`YES
`
`62
`
`35
`
`RREss CLEAR
`
`N
`IITII
`63 00mm
`?
`PRESS ENTER I”
`y
`
`-
`
`[
`
`INsTAILATION
`FLAGsET
`?
`
`INSTALLATION
`FLAGSET
`'2
`
`K‘ 58
`ENTER REsET
`AMOLNT
`I
`
`.
`
`4
`f6
`
`METER ENTERS CONFIGURATION
`>1 PENDING MOOE
`K6
`‘&
`METER OIsPIAYs CONFIGURATION
`REOLEsToOOE
`
`FIG.
`
`Petitioners Ex. 1005 Page 4
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 4 of 7
`
`5,077,660
`
`DATA CENTER COMPUTER
`
`AGBIT
`
`/' 70
`ENTER CODES
`AND PASSWORD
`
`-(
`
`ENTER METER ./
`SERIALNUMBER
`
`K79
`
`NOTIFY AGENT —->
`
`[90
`
`I
`ENTER PREVIOUSLY WRITTEN
`DOWN DATA
`
`/'84
`
`K88
`ENTER CONFIGURATION REQUEST
`(III
`
`GENERATE OOQFIGURATIOJ
`IHJLESTOODE
`
`91
`No
`
`our
`MAICH
`
`-
`
`92
`
`/
`‘ NOTIFY AGENT
`
`YES
`[93
`GENERATE CONFIGURATION ENABLE
`CODE USING HSL VALUE
`
`K94
`
`INCREMENT
`CTID
`
`f 95
`DISPLAY ASCENDED CONFIGURATION
`BQABLE CODE
`
`FIG. 4
`
`Petitioners Ex. 1005 Page 5
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 5 of 7
`
`5,077,660
`
`r100
`ENTER APPENDED HSL VALUE AND
`OONF'IGURA'I'IG‘J ENABLE CODE
`
`K102
`METER GB‘IERATES OU‘IFIGURATION
`ENABLE CODE USING HSL VALUE
`
`METER
`
`K105
`
`AGENT NOTIFIED ‘
`
`YE K106
`METER INCREMENTS
`CTID
`
`r107
`
`METER STORES
`HSL VALUE
`
`METER STORES RESET AMOLNT
`IN BAM
`
`L__
`
`|
`I
`
`I
`
`METER CLEARS CONFIGURATION
`FLAG
`
`Petitioners Ex. 1005 Page 6
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 6 of 7
`
`5,077,660
`
`/' 14'
`
`10'
`\ KEYBOARD
`X/Y VALUE
`
`f 16'
`
`DISPLAY
`
`/ 13'
`
`_____ _ - SP5“?
`
`_ _
`
`_
`
`r202
`ve comnouzn
`
`:
`I
`:
`I
`I
`
`I
`|
`I
`:
`I
`|
`l
`:
`I
`l
`
`:
`
`I
`
`:
`I
`.
`20o
`:
`f 26
`I/
`I
`IAQQE___@_SE_____
`ow MIIINE
`R
`NEW MTN
`INSTALLATION FLAG
`RasErAMouNT
`INSTALLATION DATE
`c'rw/sno
`MEDER SERIAL #
`
`f 21 o
`
`f- 212
`
`(III
`cowARAToR '> VAUDATOR
`
`f 21
`
`Cm
`'NCREMENTOR
`
`K208
`CODEGENERATOR/ <_ DATA
`EmRYPrOR
`oomnousn
`I
`
`f 204
`
`r2”
`
`I
`|
`I
`:
`I
`I
`I
`I
`I
`I
`
`:
`
`I
`
`ACCT
`
`I _ . _ _ . _ _ _ _ _ _
`
`mmsnon
`
`I
`
`'
`
`:
`I
`r 20 I
`cLorx I<->‘
`I
`
`OPERA f 206
`Cam‘ IOIIEISR
`
`I
`
`:
`:
`'
`I
`
`FEATURES
`
`I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .1
`
`SOFTWARE
`
`PRINT
`MECHANISM
`
`FIG.
`
`.
`
`METER INTERIOR
`
`I \ METER HOUSING
`
`Petitioners Ex. 1005 Page 7
`
`

`

`US. Patent
`
`Dec. 31, 1991
`
`Sheet 7 of 7
`
`5,077,660
`
`E11
`
`sELEcT METER nEnoTE
`CONFIGURATION uonE
`A46
`
`ENTER uEw
`m
`
`NOTIFY
`
`PRESS OLEAR' T
`
`PRESS ENTER
`L
`
`METER
`
`METER EITEns moE BY cmcmc
`MODE REGISTER
`1
`METER msmvs NEEDED
`momma
`
`METER STORES NEI m in am
`
`"44
`
`r448
`
`(I64 '
`METER ENTERS CONHGURATION
`mums uonE
`
`(I66
`METER msmvs GONHGURATION
`aEouEsT 000E
`'
`
`H6. 7
`
`Petitioners Ex. 1005 Page 8
`
`

`

`1
`
`REMOTE METER CONFIGURATION
`
`5,077,660
`2
`enable code and also generates an internal con?guration
`enable code using the same algorithm as the data center
`computer. If the con?guration enable codes agree, the
`meter overwrites the old meter type number with the
`new meter type number, thereby recon?guring the
`meter.
`A further understanding of the nature and advantages
`of the present invention can be realized by reference to
`the remaining portions of the speci?cation and the at
`tached drawings.
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. I is a block diagram of a preferred postage
`meter capable of being recon?gured in the ?eld;
`FIG. 2 is a high level ?owchart of the process fo
`recon?guring the postage meter;
`‘
`FIG. 3 is a detailed ?owchart of the procedure for the
`agent to obtain a con?guration request code generated
`by the meter in the second embodiment;
`FIG. 4 is a detailed flowchart of the procedure for the
`agent to con?rm the con?guration request code with
`the data center computer;
`FIG. Sis a detailed ?owchart of the procedure for the
`agent to enter the con?guration enable code into the
`meter;
`FIG. 6 is a block diagram of an alternative postage
`meter capable of being recon?gured in the ?eld; and
`FIG. 7 is a detailed ?owchart of the procedure for the
`agent to obtain a con?guration request code generated
`by the meter in the ?rst embodiment.
`
`25
`
`30
`
`20
`
`Related copending applications include: “REMOTE
`METER I/O CONFIGURATION", ?led Mar. 23,
`1989, Ser. No. 07/327,779; “SECURITY EXTEN
`SION PROCEDURE FOR REMOTE SETTING
`METE "’, ?led Mar. 23, I989, Ser. No. 07/328,099; and
`“EMERGENCY POST OFFICE FOR REMOTE
`SETTING METER", ?led Mar. 23, 1989, Ser. No.
`07/327,487.
`FIELD OF THE INVENTION
`The present invention relates generally to postage
`meters and more particularly to electronic meters capa
`ble of being recon?gured.
`BACKGROUND OF THE INVENTION
`With the advent of electronic postage meters, it has
`become possible to offer meter customers a large num
`ber of optional features. Each additional feature, how
`ever, creates a larger number of possible combinations
`of features. Therefore, in order for a meter company to
`provide a large selection of features, it must maintain a
`large inventory of meters. This is costly and inef?cient.
`In rental or leasemarkets, the inventory problem is
`increased by customer demands for a replacement
`meter of like features when the meter in service is dam
`aged or fails.
`A customer needing to replace the meter or wanting
`to change the features on his meter must wait for the
`agent of the meter company to obtain a meter having
`the desired set of features. If the agent does not have a
`large inventory, it becomes necessary to have a meter
`con?gured at the factory. Therefore, any attempts to
`reduce the number of meters in the pipeline will ad
`versely affect the length of time necessary to service the
`customer’s request.
`SUMMARY OF THE INVENTION
`The present invention provides a technique for se
`curely recon?guring postage meters in the ?eld,
`thereby allowing variation of the features of the meter.
`The technique is readily implemented in the meter soft
`ware. Because the technique provides security over the
`meter recon?guration process, only authorized meter
`recon?gurations can occur. Therefore, the company
`will always have a correct record of the con?guration
`of the meter in the ?eld.
`50
`The technique assumes that the meter has a set of
`features that may be selectively enabled or disabled by
`software. The meter is capable of being put into a con
`?guration mode by suitable entries from the keyboard,
`in which mode it is inhibited from printing postage. The
`55
`meter has a storage register for a current or old meter
`type, and can receive a desired new meter type via
`keyboard entry. The meter has software for generating
`an encrypted con?guration request code that is partially
`based on the values of the old and new meter types. The
`con?guration request code, when communicated to a
`60
`data center computer along with other validating iden
`ti?cation information, is checked by the data center
`computer which computes the con?guration request
`code using the same algorithm. If the two values agree,
`the data center computer generates an encrypted con
`?guration enable code that is partially based on the
`meter serial number. This is communicated to the me
`ter, which receives the meter generated con?guration
`
`35
`
`45
`
`65
`
`DETAILED DESCRIPTION OF THE SPECIFIC
`EMBODIMENTS
`Meter Overview : Structure
`FIG. 1 is a block diagram of a preferred postage
`meter 10 that can be recon?gured in the ?eld. Meter 10
`includes a print mechanism 12, accounting registers,
`and control electronics,‘ all enclosed within a secure
`meter housing 13. A keyboard 14 and a display 16 pro
`vide the user interface. A connector 17 provides an
`electrical connection with a mailing machine for con
`trol of the printing process. The control electronics
`includes a digital microprocessor 18 which controls the
`operation of the meter, including the basic functions of
`printing and accounting for postage, and optional fea
`tures such as department accounting and remote setting.
`The microprocessor is connected to a clock 20, a read
`only memory (ROM) 22, a random access memory
`(RAM) 24, and a battery augmented memory (BAM)
`26.
`ROM 22 is primarily used for storing nonvolatile
`information such as software and data/function tables
`necessary to run the microprocessor. The ROM can
`only be changed at the factory. RAM 24 is used for
`intermediate storage of variables and other data during
`meter operation. BAM 26 is primarily used to store
`accounting information that must be kept when the
`meter is powered down. The BAM is also used for
`storing certain flags and other information that is neces
`sary to the functioning of the microprocessor. Such
`information includes meter identifying data such as the
`meter serial number and BAM initialization date, and a
`number of parameters relevant to the remote con?gura
`tion of the meter.
`The meter is provided with a number of features that
`may be enabled or disabled by software. Representative
`features include department accounting (with various
`
`Petitioners Ex. 1005 Page 9
`
`

`

`4
`Selection Table to determine whether the meter is con
`?gured to have a certain feature or not and thereby
`execute the appropriate code.
`Upon the execution of the appropriate software code,
`the microprocessor returns to a scanning state as it waits
`for further user input.
`
`5,077,660
`3
`levels of sophistication and numbers of departments that
`can be tracked), set date prompt, low postage warning,
`calculator mode variable length security codes (see'
`Appendix D for details), and remote setting. The re
`mote setting feature is a capability of having the meter’s
`postage amount increased without removing the meter
`from the customer site. In a ?rst embodiment of the
`invention, the meter postage amount can be increased
`by a variable amount during the remote setting process.
`Alternatively, in a second embodiment of the invention,
`the meter postage amount can be increased by a ?xed
`increment called the ?xed remote setting amount. The
`?xed remote setting amount may then be varied during
`remote con?guration of the meter. Additionally, the
`meter may have four print wheels (maximum postage
`$99.99), but the high order print wheel may be disabled
`(maximum postage $9.99).
`In the ?rst and second embodiments, certain meter
`features are hardware con?gured and cannot be set by
`software. This includes the print indicium (U .8. Postal
`Service or United Parcel Service) and the position of
`the decimal point (four-bank whole cents or four-bank
`decimal cents). These features may be software con
`trolled and con?gurable in alternative embodiments of
`the invention.
`25
`Whether a feature or a feature set is enabled is con
`trolled by a meter type number (MTN) representing the
`set of features enabled. The MTN is stored in BAM and
`is checked by the microprocessor during meter power
`up and at some branch points in the software.
`
`30
`
`35
`
`40
`
`Meter Relationship with the Data Center Computer
`In the ?rst and second embodiments, the meter is
`con?gured to a standard feature set before leaving the
`factory. Because the feature set is known, the meter can
`be functional and still does not need to be registered on
`the data center computer until it has been recon?gured
`a ?rst time. In an alternative embodiments, the meter
`can be disabled state for security reasons until it has
`been recon?gured a ?rst time.
`During the recon?guration process, the meter’s serial
`number, present con?guration and other information
`speci?c to the meter (which were already stored in the
`meter’s memory during an initialization process at the
`factory) are entered on the data center computer. The
`meter and the computer are then able to generate identi
`cal encrypted codes by using the same encryption rou
`tine and input numbers. The encrypted codes help the
`data center computer maintain control over the feature
`set of each meter.
`.
`'
`Two input numbers used by the meter and the com
`puter to generate encrypted codes are the con?guration
`transaction identi?er (“CTID”) and the setting transac
`tion identi?er (“STID”). They are both speci?c to the
`meter and dependent upon the meter serial number.
`They may also be incremented after each use. The
`CT-ID is normally used for recon?guring the meter
`functions and the STID is normally used for remote
`setting the meter postage. Separate numbers are used
`for the separate procedures in order to maximize secu
`rity and minimize complexity caused by interdepen
`dence. The encryption routine is described in greater
`detail below.
`Meter Con?guration Method
`FIG. 2 is a high level ?owchart of the process neces
`sary for recon?guring the postage meter by an agent at
`a customer's site or at the agent’s technical service area.
`In a ?rst stage 30, the agent obtains a con?guration
`request code generated by the meter. This con?guration
`request code is essentially a password to the data center
`computer, and is based upon a combination of factors,
`the combination of which only the data center com
`puter would know. In a second stage 32, the agent con
`?rms the con?guration request code with the data cen
`ter computer. Upon con?rmation from the computer,
`the computer provides a con?guration enable code back
`to the agent. The con?guration enable code is essen
`tially a password from the data center computer to the
`meter stating that it is permissible to recon?gure to the
`desired feature set. In a third stage 34, the agent enters
`the con?guration enable code into the meter. The meter
`con?rms the con?guration enable code and recon?g
`ures itself.
`FIG. 3 is a detailed flowchart of stage 30 for the
`second embodiment. Some meters have displays that
`are sophisticated and allow for user prompting. There
`fore, in each of the steps described below where the
`meter requires certain information in order to move to
`the next step, some meters may prompt the agent to
`make that step.
`
`Meter Overview : Operation
`In order to simplify the software and enhance micro
`processor performance in the ?rst and second embodi
`ments, the microprocessor performs several initializa
`tion procedures during meter power-up. In some of the
`initialization procedures, the microprocessor uses the
`MTN stored in BAM to index in RAM the software
`code stored in ROM to tables also stored in ROM. This
`indexing allows the microprocessor to more quickly
`read the proper tables for information without having to
`repeatedly determine what table to read.
`One indexed table is a Meter Selection Table which
`contains information regarding what features the meter
`has based upon the MTN and the type of meter (i.e. US.
`Postal Service or United Parcel Service, four-bank
`whole cents or four-bank decimal cents, etc.). Another
`indexed table is a Key Table which contains the address
`of the appropriate software code to be executed when a
`key is pressed by the user. The Key Table indexing is
`also partially based upon the MTN. After the initializa
`tion procedures are performed, the microprocessor
`waits for user input.
`The microprocessor is able to determine user input by
`periodically scanning the keyboard. As a key is pressed,
`x and y coordinate values are determined by the micro
`processor. The microprocessor converts the x and y
`coordinate values to an equivalent ASCII byte. The
`microprocessor sends the ASCII byte to the display,
`which contains its own internal decoder and driver for
`displaying the ASCII information to the user. The mi
`croprocessor then determines what software code in
`ROM to execute based upon the ASCII byte by reading
`the indexed Key Table in ROM.
`The software code contains branch points where the
`microprocessor must read a table in ROM or a variable
`in BAM to determine which code to execute. For exam
`ple, the microprocessor may read the indexed Meter
`
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`20
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`5,077,660
`5
`6
`prompts the agent to enter the reset amount by which
`In a ?rst step 40, the agent then puts the meter into a
`remote con?guration mode by pressing a certain key
`postage will be increased through use of the remote
`setting feature (step 58). If the new MTN does not en
`sequence and entering a service access code. The key
`able the remote setting feature, i.e., the output of deci
`sequence is not obvious. This prevents customers and
`other unauthorized personnel from accidentally enter
`sion box 53 is “no”, the meter determines if the installa
`tion ?ag has been set (step 54). A set installation ?ag
`ing the con?guration mode. The service access code is
`known to the agent and must be entered after complet
`indicates that the meter has been “installed” in accor
`dance with the procedures described in Appendix A
`ing the key sequence within a limited time interval that
`is checked by the microprocessor in combination with
`and is linked with the post of?ce in the central data
`computer. The enablement status of the remote setting
`the clock. This further prevents customers and other
`unauthorized personnel from entering the con?guration
`feature may not be changed in a meter so installed. If the
`installation ?ag is set, the proposed recon?guration is
`mode.
`Upon entry of the predetermined key sequence and
`rejected and the agent so noti?ed (step 52). If the instal
`lation flag is not set, the meter displays the new MTN
`the agent access code, the meter enters the remote con
`for agent con?rmation (step 65).
`?guration mode by setting a mode register located in
`BAM (step 42). This prevents the meter from being
`If, however, the meter determines, at step 50, that the
`used for printing purposes while being recon?gured.
`new MTN will not change the enablement status of the
`remote setting feature, the meter next determines
`The meter then displays the meter serial number, the
`whether this status is enabled (step 56). If it is, the meter
`meter BAM initialization date, and the old meter type
`number (old MTN) (step 44). The BAM initialization
`determines if the installation flag is set (step 57). If the
`date is preferably a four digit number wherein the four
`installation ?ag is not set, the meter permits the agent to
`change the reset amount as part of the re-con?guration.
`digits YDDD express the date in which the meter was
`last initialized. The DDD stands for the number of days
`The meter prompts the agent to enter the reset amount
`since December 31 and Y is the least signi?cant digit of
`to be associated with the remote setting feature. If,
`however, the installation flag is set (step 57), or the new
`the year in which the meter was initialized. The old
`25
`MTN does not enable the remote setting feature (step
`MTN is a number that de?nes the present feature set
`that the meter is presently con?gured to.
`56), the meter omits step 58 and displays the new MTN
`for agent con?rmation (step 65).
`In the second embodiment, the meter also displays
`the Ascending Register amount or some other meter
`If the agent wants to start the process again with a
`speci?c identifying information (step 44). The Ascend
`new MTN, then the agent must press a selected key
`ing Register contains the amount of postage the meter
`such as the CLEAR key (step 62). If the agent wants to
`has printed since the meter has been initialized.
`continue, then the agent must press a selected key, such
`as the ENTER key, followed by the service access code
`The agent then enters the new MTN into the meter
`or some other con?rmation code (step 63). At this point,
`(step 46). This new number represents the set of features
`that the meter will have after recon?guration. The
`the meter puts the meter in a con?guration pending
`mode by setting a meter con?guration flag located in
`agent must then press a selected key, such as the
`BAM (step 64) Once in the con?guration pending
`ENTER key, followed by the service access code
`mode, the meter must be recon?gured properly or else
`within a limited time interval to indicate that the en
`it will not return to the print mode. This prevents tam
`tered new MTN is correct and desired. If the entered
`pering with the recon?guring of the meter. The meter
`new MTN is incorrect or not desired, the agent may let
`the timer'expire or press another selected key such as a
`remains in this mode even when the meter is turned off
`CLEAR key. The agent then enters the correct new
`and then turned back on.
`The meter then generates and displays an encrypted
`MTN or exits the remote con?guration mode. Once the
`meter con?guration request code (step 66). In the sec
`correct new MTN is entered, the agent must press the
`selected key (i.e., ENTER) followed by the service
`ond embodiment, the con?guration request code is par
`tially based on the Ascending Register amount or some
`access code within a limited time interval to indicate
`other meter identifying register, the old MTN, the new
`that it is the correct new MTN. The meter then stores
`MTN, and the remote setting amount. The encryption
`the new MTN in BAM (step 48).
`process for the ?rst and second embodiments is de
`The meter then performs a series of tests to determine
`scribed in further detail below.
`whether the meter is authorized to recon?gure to the
`new feature set represented by the new MTN. In the
`FIG. 4 is a ?owchart of stage 32 as shown in FIG. 2
`for the ?rst and second embodiments. The agent estab
`second embodiment, the meter also allows the agent to
`enter the ?xed remote setting amount following the
`lishes communication with the data center computer
`series of tests.
`over a standard telephone. In the ?rst and second em
`bodiments, the agent may communicate with the data
`The meter compares the new MTN with the old
`MTN to determine whether the remote setting feature
`center computer on a touch tone telephone by pressing
`will be among those features changed by the adoption
`the keys. Alternative embodiments may utilize a tele
`of the new MTN (step 50). If there will be such a
`phone communications device that includes a user or
`change (either enabling a disabled remote setting fea
`meter interface and a modem, or by voice recognition
`ture or disabling an enabled remote setting feature), the
`over a telephone.
`meter determines if the amount in the descending regis
`The agent ?rst enters various codes and a password
`to the computer (step 70). These include a transaction
`ter is equal to zero (step 51). If the amount in the de
`scending register is not equal to zero, the meter rejects
`code (which describes that the agent is attempting to do
`the attempted re-con?guration and noti?es the agent
`a remote con?guration for a meter) his employee num
`(step 52). If the amount in the descending register is
`ber, and his authorization code (which is a password to
`the data center computer for that employee).
`zero, the meter determines whether the new MTN ena
`bles the remote setting feature (step 53). If the new
`The agent then enters the meter serial number which
`MTN enables the remote setting feature, the meter
`was previously displayed by the meter but can also be
`
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`7
`found on the exterior of the meter (step 76). If the data
`center computer determines that the serial number is
`within a valid range (step 78), then the user may con
`tinue. Otherwise, the computer will notify the agent
`that the serial number is not within a valid range (step
`79) and the agent must reenter the serial number or
`terminate the transaction.
`The agent then enters data previously obtained in
`step 44 and written down above (step 84). In the ?rst
`embodiment, this includes the BAM initialization date,
`the old MTN and the new MTN. In the second embodi
`ment, this includes the BAM initialization date, the old
`MTN, the new MTN, the Ascending Register amount,
`and the remote setting amount.
`The agent then enters the con?guration request code
`from the meter (step 88). From the information above,
`the computer is also able to generate a con?guration
`request code (step 90). The computer checks that its
`con?guration request code matches the con?guration
`request code generated by the meter (step 91). If they
`do not match, then the agent has improperly entered
`numbers, the meter has been improperly recon?gured,
`or some other error has occurred. If the codes do not
`match, then the agent is noti?ed (step 92) and must
`repeat the above steps starting with entering the meter
`serial number (step 76) or terminate the transaction.
`If the two codes match, then the computer generates
`an encrypted con?guration enable code using the cur
`rent high security length (HSL) value (step 93). The
`data center computer or other CTID counter then in
`crements the CTID located within the computer (step
`94). The HSL value is a level of security presently uti
`lized by the meter and data center computer which
`affects the length of codes passed between the meter
`and the data center computer (see encryption routine
`and Appendix D for details). The computer appends the
`HSL value to the con?guration enable code and con
`veys the appended code to the agent (step 95).
`FIG. 5 is a ?owchart of stage 34 shown above in FIG.
`2. The agent enters the appended computer generated
`HSL value and con?guration enable code into the
`meter (step 100). The meter then generates its own
`con?guration enable code using the appended HSL
`value (step 102) and compares that code with the en
`tered con?guration enable code (step 104). If the codes
`do not agree, then the agent is noti?ed (step 105) and the
`agent reenters the computer generated code. If the
`con?guration enable codes agree, then the meter knows
`that it is authorized to recon?gure. The meter then
`increments the CTID (step 106). The meter stores the
`new HSL value and the MTN in the HSL value loca
`tion and the meter type number location in BAM (steps
`107, 108). In the second embodiment, the meter also
`stores the ?ve-digit remote setting amount in the remote
`setting amount location BAM if it was entered (step
`110). The meter then clears the con?guration ?ag (step
`112), thereby allowing the meter to return from the
`con?guration pending mode to the print mode.
`
`Alternative Meter
`FIG. 6 is a block diagram of an alternative postage
`meter capable of being recon?gured in the ?eld. Primed
`reference numerals are used for blocks that correspond
`to those in FIG. 1.
`Meter 10' includes an external keyboard 14' and a
`display 16' to provide for user interface with the meter.
`A secure meter housing 13' encloses a print mechanism
`12‘, clock 20’, registers or ?ip-?ops 26’, and control
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`circuitry 200. The control circuitry includes several
`controllers and other hard-wired circuits in lieu of a
`microprocessor as shown in FIG. 1.
`The control circuitry includes an I/O controller 202
`which performs as an interface between the rest of the
`control circuitry and the keyboard and display. A data
`controller 204 performs as an interface between the
`registers and the rest of the control circuitry. An opera
`tions controller 206 controls the operations of the meter
`by executing the feature software stored in the registers.
`The operations controller knows which features to
`execute by checking the new MTN register stored in
`BAM. An inhibitor 207 checks the mode register stored
`in the registers to determine whether operations of the
`meter should be inhibited.
`A code generator/encryptor 208 continuously checks
`various registers in the registers and generates two en
`crypted codes based upon thos