US0058945 16A
`*
`5,894,516
`[11] Patent Number:
`United States Patent os
`Brandenburg
`[45] Date of Patent:
`*Apr. 13, 1999
`
`
`[54] BROADCAST SOFTWARE DISTRIBUTION
`
`[75]
`
`Inventor: Barbara B. Brandenburg, Columbia,
`S.C.
`
`i
`.
`‘
`:
`[73] Assignee: NCR Corporation, Dayton, Ohio
`[*] Notice:
`This patent issued on a continued pros-
`.
`ss
`ecution application filed under 37 CFR
`1.53(d). and is subject to the twenty year
`patent
`term provisions of 35 U.S.C.
`154(a)(2).
`[21] Appl. No.: 08/679,638
`‘
`[22] Filed
`Jul. 10, 1996
`
`ccccsesecccccccsceseenscnevesssensesecsensee H6¢4L 9/00
`Tint. C0S cnc
`[ST]
`vane 3580/4: 380/9; 380/21;
`[52] U.S. Cl.
`......
`380/23:“380/25: 380/49: 380/50; 348/6;
`455/3.1: 455/3.2
`[58] Field of Search ....cccncmennen 380/4, 21,9. 10,
`380/20, 49, 50, 59, 23. 25; 705/26, 27;
`348/6, 7. 8. 9, 12; 455/3.1. 3.2, 4.1, 4.2,
`5.1, 6.1, 63
`
`[56]
`
`References Cited
`
`.....---ssssssrsesecrerers 380/50
`6/1993 Hartman, Jr.
`5,224,166
`veeseeceesenseeeeseneees 380/23
`2/1995 Berson «0...
`5,388,158
`-» 380/4
`2/1995 Hasebe etal.
`5,392,351
`. 380/21
`3/1995 Pahn et al.
`.......
`5,400,403
`- 380/4
`5/1995 Came et al. ...
`5,416,840
`. 380/30
`12/1996 Yuval etal. .....
`5,586,186
`. 38004
`1/1997 Cooper et al.
`51598470
`380/25
`ootge vtooe ntetal.
`..
`w» 455/436
`ADL sas
`ceneeeree
`154,
`5.761301
`6/1998 Oshimaet al. ceceeceeee 380/4
`
`
`
`Primary Examiner—Bernarr E. Gregory
`Attorney, Agent, or Firm—Gates & Cooper
`B4I
`ABSTRACT
`A method. apparatus, and article of manufacture for broad-
`casting encrypted software to a target computer enables
`simultaneous transmission to a plurality of licensed target
`computers. An encryption key is generated to encrypt a
`software package. The encryption key is then itself
`encrypted using a target computer identification code, and
`_, the encrypted encryption key is loaded onto the target
`computer. The encrypted software is broadcast, for example,
`via satellite, and received at the target computer. The target
`computer uses its identification code to decrypt
`the
`encrypted encryption key (i.e., unlock the encryption key).
`Oncethe target computer unlocks the encryption key,it uses
`the encryption key to decrypt the software to be installed on
`the target computer.
`
`U.S. PATENT DOCUMENTS
`6/1991 Johnson et al.
`..........cssssesesseseee 380/4
`5,023,907
`
`
`3,034,980—7/I991 Kubotaeeseensscsesnseeseteeseseees 380/4 21 Claims, 4 Drawing Sheets
`
`
`
`PERIPHERAL COMPUTERS
`
`
`
`
`SOFTWARE
`DISTRIBUTION
`
`
`CENTER
`
`
`
`NSTALLER/RECEIVER
`
`ENCRYPTOR
`
`
`
`Zynga Ex. 1012, p. 1
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 1
` Zynga v. IGT
` IPR2022-00199
`
`

`

`U.S. Patent
`
`Apr. 13, 1999
`
`Sheet 1 of 4
`
`5,894,516
`
`PERIPHERAL
`
`TARGET
`
`COMPUTER
`
`COMPUTERS
`
`
`ENCRYPTOR
`
` CENTER
`DISTRIBUTION
`SOFTWARE
`
`1
`
`FIG.
`
`Zynga Ex. 1012, p. 2
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 2
` Zynga v. IGT
` IPR2022-00199
`
`

`

`U.S. Patent
`
`Apr. 13, 1999
`
`Sheet 2 of 4
`
`5,894,516
`
`60
`
`62
`
`INSTALL LICENSING AND RECEIVER/INSTALLER
`PROGRAM ON TARGET COMPUTER
`
`TARGET COMPUTER CALLS SOFTWARE
`DISTRIBUTION CENTER (SDC)
`
`64|TARGET COMPUTER ORDERS SOFTWARE AND PROVIDES
`SDC WITH TARGET COMPUTER ID NUMBER
`
`66
`
`68
`
`70
`
`SDC ENCRYPTS SOFTWARE USING
`TARGET COMPUTER ID NUMBER
`
`SDC PROVIDES ENCRYPTION KEY
`TO TARGET COMPUTER
`
`ENCRYPTION KEY ENTERED INTO
`TARGET COMPUTER
`
`72
`
`74
`
`TIME AND CHANNEL/FREQUENCY OF
`BROADCAST OF SOFTWARE PROVIDED TO
`USER OF TARGET COMPUTER
`
`SDC COMPRESSES AND
`TRANSMITS SOFTWARE
`
`76
`
`TARGET COMPUTER RECEIVES
`TRANSMITTED SOFTWARE
`
`
`
`
`
`
`82
`
`TARGET COMPUTER DISTRIBUTES
`SOFTWARE TO OTHER MACHINES
`
`84
`TARGET COMPUTER DECRYPTS
`AND DECOMPRESSES SOFTWARE
`
`TARGET COMPUTER
`INSTALLS SOFTWARE
`
`FIG. 2
`
`86
`
`Zynga Ex. 1012, p. 3
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 3
` Zynga v. IGT
` IPR2022-00199
`
`

`

`QN3
`
`Q3SS3IYdNOD
`
`LOndodd
`WNSHO3HSD
`
`
`
`TIWLSNINOISYSA
`
`Qi
`
`Longodd
`
`U.S. Patent
`
`Apr. 13, 1999
`
`Sheet 3 of 4
`
`5,894,516
`
`isvodvoys
`
`Ii
`
`¢“Old
`
`Zynga Ex. 1012, p. 4
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 4
` Zynga v. IGT
` IPR2022-00199
`
`

`

`US. Patent
`
`Apr. 13, 1999
`
`Sheet 4 of 4
`
`5,894,516
`
`FIG. 4
`
`TRANSMISSION OF COMPRESSED
`SOFTWARE PACKET
`
`TRANSMISSION OF
`CHECKSUM PACKET
`
`COMPUTERS
`
`DETERMINE IF TRANSMISSION
`SUCCESSFUL BY MATCHING
`CHECKSUM WITH COPIED FILE
`
`TARGET COMPUTER DECRYPTS
`AND DECOMPRESSES FILE
`OR DISTRIBUTES TO OTHER
`
`NO
`
`Zynga Ex. 1012, p. 5
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 5
` Zynga v. IGT
` IPR2022-00199
`
`

`

`5,894,516
`
`1
`BROADCAST SOFTWARE DISTRIBUTION
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`This invention relates in general to broadcastdistribution,
`and in particular, to broadcast software distribution using
`encryption key locking and unlocking procedures.
`2. Description of Related Art
`The software industry as a whole has experienced tre-
`mendous growth in recent years. There is a continuous
`demand for new software products that address the needs in
`new or changing industries. Moreover. software companies
`routinely upgrade previously-released software products in
`response to specific user needs and/or to provide a product
`in a more efficient manner.
`
`Software companies havetraditionally distributed its soft-
`ware products through physical media such as tapes or
`diskettes, and, more recently, CD ROM. Companies store
`their software on these physical media and ship them to
`customers for installation onto their home computers.
`In distributing software by this method. however, various
`problems have been encountered. The cost of media
`duplication, shipping, and storage is quite high in many such
`applications. Moreover, the elimination of many types of
`such physical media has created unwanted environmental-
`waste concerns.
`In addition.
`this type of distribution
`involves unwanted delay associated with waiting for media
`copies. packing, addressing, and shipping to obtain new
`products or new versions of existing products.
`.
`An alternative method of distributing software is through
`phone lines. Software distribution centers, having a host
`computer with a modem,
`transmit the software through
`phone lines to a customer’s computer in response to the
`customer’s order for particular software packages.
`This alternative form of distribution has also encountered
`problems. The number of customers who can receive a given
`transmission is limited by the physical capabilities of the
`phonelines. If numerous customers order the same software
`package, such as when a company distributes an upgraded
`version to existing subscribers, the software company must
`repeatedly transmit the same software package until all its
`customers have received the product. This approach is both
`costly and time consuming.
`Accordingly, there is a need for an improved method and
`computer system for distributing software that overcomes
`the above-mentioned deficiencies associated with prior tech-
`niques. The present invention provides a solution to these
`and other problems, offering advantages over conventional
`implementations.
`
`SUMMARY OF THE INVENTION
`
`To overcome the limitations in the prior art described
`above, and to overcome other limitations that will become
`apparent upon reading and understanding the present
`specification,
`the present
`invention provides a unique
`method, apparatus, and article of manufacture for broadcast-
`ing encrypted software to a target computer. In one embodi-
`ment of the present invention, an encryption key, which is
`uniqueto the particular software package.is used to encrypt
`the software package.andis then itself encrypted using the
`unique identification code of the target computer. This key
`is loaded onto the target computer. to lock the particular
`software package to the target computer. The software is
`then broadcast from a send computer and received at the
`target computer. In a more particular implementation, the
`
`2
`software is broadcast via satellite. The target computer
`obtains the encryption key by decrypting the encryption key
`using its identification code. The encryption key is then used
`to decrypt the software to enable the software to be installed
`5 onto the target computer.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Referring now to the drawings in which like reference
`numbers represent corresponding parts throughout:
`FIG. 1 illustrates an exemplary computer system envi-
`ronment for use in accordance with the present invention;
`FIG. 2 is a flow chart illustrating exemplary steps which
`may be used to program the computer system of FIG. 1.
`according to the present invention;
`FIG. 3 illustrates the packets of a compressedfile that are
`transmitted to a target computer in a broadcast session,
`according to the present invention; and
`FIG,4 is a flow chart illustrating exemplary steps, accord-
`ing to the present invention, for verifying that software has
`been successfully transmitted in the system of FIG. 1.
`
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENT
`
`In the following detailed description of the drawings,
`reference is made to the accompanying drawings which
`form a part hereof. and in which is shown by way of
`illustration a specific embodiment in which the invention
`may be practiced. It is to be understood that other embodi-
`ments may be utilized and structural changes may be made
`without departing from the scope of the present invention.
`FIG. 1 illustrates an exemplary computer system envi-
`ronment that can be used in conjunction with the present
`invention. The exemplary environment includes a host com-
`puter 10 and an encryptor 12 at a Software Distribution
`Center (SDC), a satellite 14 for relaying transmitted
`software, a target computer 18. and peripheral computers
`20a—-n which are coupled to the target computer 18. As
`illustrated, the encryptor 12, which encrypts software pack-
`ages loaded on the host computer 16, is separate from the
`host computer 19. It is understood, however, that the encryp-
`tor 12 can be configured to be part of the host computer 10.
`In the exemplary computer environment of FIG. 1. the
`target computer 18 contains a licensing software program 22
`and a receiver/installer software program 24, which are
`typically embodied on one or more program storage devices,
`A customer is licensed or otherwise authorized to use the
`broadcast service of the present
`invention. With such
`authorization, the customer receives the licensing program
`22 and receiver/installer 24 program loads these programs
`onto the computer 18, thereby enabling receipt of software
`transmitted in accordance with this invention. The licensing
`program 22 provides for the entry and trackingof strings for
`all software products purchased. The licensing program 22
`also generates the unique computer identifier code (e.g..
`computer identification number) for the computer 10 that the
`installer/receiver program 24 runs. As described below, a
`customer provides this unique identification code whenever
`it places an order for a software package. The installer/
`receiver software program 24 enablesthe target computer 18
`to receive software that is broadcasted. for example via
`satellite 14, and to install
`the software onto the target
`computer 18. The peripheral computers 26a—n also contain
`installer/receiver software.
`
`The host computer 10 in FIG. 1 contains a library of
`stored software packages that customers may order. For each
`
`25
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`Zynga Ex. 1012, p. 6
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 6
` Zynga v. IGT
` IPR2022-00199
`
`

`

`5,894,516
`
`3
`software package, an encryption key is generated and the
`software package is encrypted using that encryption key.
`The encrypted software is then compressed and stored as
`one packet in a single compressed file. The compressedfile
`also includes a packet which identifies the particular soft-
`ware product included in the file. As described in more detail
`below in connection with FIGS. 3 and 4, each compressed
`file further includes a checksum packet which is generated
`at
`the time the software package is encrypted and
`compressed, enabling the target computer 18 to determine
`whether a software package is transmitted without error. A
`transmitting program on the host computer 10 contains
`information regarding the time at which each software
`package will be transmitted. The transmission and encryp-
`tion of software are performed using techniques well-known
`in the art.
`
`Referring now to FIG. 2, a flow chart is illustrated
`detailing the steps which may be used to program the
`computer system of FIG. 1, with the host computer 10
`tansmitting a software package to a target computer 18
`through a broadcast medium, according to the present inven-
`tion. Block 30 represents installation of a licensing program
`and receiver/installer program on the target computer 18. As
`explained above, only users having this software on their
`computer receive software according to this invention; the
`encrypted software that is transmitted via satellite is other-
`wise unusable.
`
`Blocks 32 and 34 represent the target computer 18 calling
`the SDC to order a particular software package. When the
`customer orders the software, the customer selects an option
`provided by the licensing program 22, which produces the
`identification code of the target computer 18. A customer
`gives his identification code to the operator receiving the
`software order at the SDC.
`Block 36 represents the SDC encrypting the encryption
`key specific to the ordered software package. When the SDC
`receives the identification number of the target computer 18.
`it produces a new key(e.g.. an ASCII string) by encrypting
`the software encryption key for the ordered software pack-
`age using the identification code of the target computer 18.
`The purpose of the new key (i.e., the encrypted encryption
`key) is to lock a particular computer (e.g., the computer with
`the identification code used to encrypt the encryption key) to
`a particular software package. Instead of allowing any
`computer having the encryption key to listen to the broad-
`cast and obtain software illegally, only the target computer
`18 whose identification code is used to encrypt the software
`encryption key, accesses the transmitted software. As rep-
`resented in block 38, the SDC provides the new key to the
`target computer 18. The SDC provides this string to the
`target computer 18, for example. via fax or e-mail.
`Block 40 represents the user of the target computer 18
`entering the encrypted encryption key (i.e.. new key) onto
`the target computer 18. The installer/receiver program on the
`target computer 18 provides a user interface requesting the
`user to insert the new key provided by the SDC. Thetarget
`computer 18 then stores this key.
`Block 42 represents the SDC providing to the user of the
`target computer 18 the time and channel/frequency that the
`ordered software will be broadcast. Software products are
`broadcast from the SDC, for example, during scheduled
`timeslots. Preferably, popular products are broadcast at
`regular intervals, while relatively uncommonsoftware prod-
`ucts are periodically scheduled at the request of a user.
`Block 44 representstransmission ofthe software from the
`SDC at the time and channel/frequency that was communi-
`
`4
`cated to the user in block 42. The software is broadcast as
`one compressed file via satellite. The bits of the file are
`pushed out on the line in a manner similar, for example, to
`transmission over TCP/IP or modem.
`
`Block 46 represents the target computer receiving the
`software that is broadcast via satellite. At the time specified
`for transmission, users “tune in” with their receivers to the
`specified frequency or channel. As an option, the receiver
`could be set up to look for and download a specific list of
`ordered products. or specific versions of a product, For
`example, a user may want to always download new versions
`of products that were already installed so that the user
`always has the latest version of the software product.
`Block 48 represents checking whether the transmissionis
`successful. If the transmission is not successful. then the
`SDC provides the user with the relevant information regard-
`ing the next broadcast of the software. The target computer
`18 then waits until that time that the software is retransmit-
`
`ted and subsequently receives the software as described in
`connection with block 46. If the transmission is successful.
`then, as represented in block 50,
`the target computer
`decrypts the encrypted encryption key using its identifica-
`tion code. Once this is performed,
`the target computer
`decrypts the software using the encryption key specific to
`the software product.
`The decryption of the software. represented in block 52,
`at the target computer 18 occurs as follows. The licensing
`program 22 generates the identification code of the target
`computer 18 which, in turn. is transmitted to the receiver/
`installer program on the target computer 18.
`In the
`alternative, the receiver/installer program itself generates the
`identification code. The receiver/installer program 14 on the
`target computer 18 utilizes this identification number to
`decrypt the encrypted encryption key. The encryption key in
`turn enables the target computer 18 to decrypt(i-e., unlock)
`the transmitted software. This process occurs virtually
`simultaneously,
`thereby making it extremely difficult to
`identify the encryption key during the process.
`Consequently, only the target computer 18 can decrypt the
`software,
`
`Block 54 represents determining whether there are other
`peripheral computers to receive the software. If there are no
`peripheral computers,the target computer 18, as represented
`in blocks 56 and 58, decompresses and installs the software
`onto the target computer 18. Specifically.
`the installer/
`receiver program 24 invokes a routine to decrypt and
`decompress the temporary data file. This part of the instal-
`lation copiesfiles to the file destination with the appropriate
`permissions and ownership on the target computer 18.
`Moreover, it kicks off any installation scripts required to
`complete the installation, configuration, or tuning specific
`for the application installed.
`As depicted in blocks 60, 62 and 64, if there are other
`peripheral computers connected to the target computer 18,
`then the target computer 18 distributes the software to the
`peripheral computers 20a—1 which in turn decompress and
`install the software. As mentioned previously, each of the
`peripheral computers 20e—7 has a receiver/installer software
`product to enable the decompression and installation of the
`software.
`
`Referring to FIG. 3. a compressed file for a software
`package is illustrated, having multiple packets. The com-
`pressed file. generally designated 70, includes a header 72,
`a compressedinstallable file packet 80. a checksum packet
`82, and an end-product broadcast packet 84. The header 72
`includes a begin product broadcast packet 74, a product
`
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`Zynga Ex. 1012, p. 7
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 7
` Zynga v. IGT
` IPR2022-00199
`
`

`

`5.894.516
`
`5
`identification packet 76 and a version packet 78. The begin
`product broadcast packet 74 signals the beginning of the
`transmission of a new software product. The product iden-
`tification packet 76 identifies the software product that is
`transmitted. Version packet 78 identifies the particular ver-
`sion of the software product that is transmitted. For example,
`the version packet 78 notifies users when a software product
`upgrade is being transmitted. Other identifying information
`could also be included as part of the header 72. For example,
`there could be a vendor header packet to enable a target
`computer to monitor for all software products that a par-
`ticular vendoroffers.
`
`Packet 86 in the compressedfile contains the compressed
`installable file. This includes the compressed software and
`the configuration scripts.
`Packet 82 is the checksum packet. As described in more
`detail below with the respect to FIG. 4, the checksum packet
`$2 enables the user at the target computer 18 to verify that
`the transmission is successful. The end product broadcast
`packet 84 notifies the target computer that the transmission
`is complete.
`Referring now to FIG.4, a flow chart illustrates the steps
`for verifying that the software is successfully transmitted.
`Block 90 represents the transmission of the compressed
`software contained in the compressed installable file packet
`80. Block 92 represents transmission of the checksum
`packet 82. The checksum packet 82 is generated at the SDC
`whenthe software product is initially compressed and stored
`at the send computer. Based on the contents of the file
`received at the target computer 18, an algorithm contained in
`the receiver/installer program 24 generates a code or number
`based on the compressedfile received at the target computer
`18. This number. which is generated using the same algo-
`rithm that generates the checksum when the software is
`compressed, is compared to the checksum packet 82. If the
`transmission has been successful, the two numbers are the
`same. At block 94 of FIG. 4, it is determined whether the
`transmission is successful by matching the checksum packet
`82 with the code generated by the file copied to the target
`computer 18. If the codes are the same, the target computer
`18. as depicted in block 96, decrypts and decompresses the
`software and installs it on the target computer 18 or distrib-
`utes it to other peripheral computers for decompression and
`installation. If the checksum packet 82 does not match the
`file that was received from the host computer 10, then the
`target computer 18 deletes the file and waits for retransmis-
`sion of the software product.
`Unlike the prior art which provides transmission through
`phone lines,
`the present invention is not limited in the
`number of customers who can receive a given transmission.
`Each customer who orders a particular software product
`receives the software from the same broadcast. Therefore.
`theoretically a single broadcast transmits to an unlimited
`amountof users.
`
`The foregoing description of the preferred embodimentof
`the invention has been presented for the purposes of illus-
`tration and description.It is not intended to be exhaustive or
`to limit the invention to the precise form disclosed. Many
`modifications and variations are possible without departing
`from the scope of the invention as defined by the claims
`appended hereto.
`Whatis claimedis:
`1. A method of distributing software encrypted by a
`software encryption key to a target computer, comprising the
`steps of:
`receiving a number unique to the target computer;
`
`15
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`
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`
`6
`encrypting the software encryption key using the number
`unique to the target computer unique number;
`transmitting the encrypted software encryption key to the
`target computer;
`communicating a timeslot and channel for broadcasting
`the encrypted software to the target computer; and
`broadcasting a messageat the communicated timeslot and
`channel, the message comprising the encrypted soft-
`ware.
`2. The method of claim 1, wherein the broadcasttimeslot
`is periodically scheduled according to a user request.
`3. The method of claim 1, wherein the transmission
`timeslot is regularly scheduled.
`4, The method of claim 1, wherein:
`the message further comprises a version packet notifying
`the target computer that an upgraded version of the
`software is being transmitted and enabling the target
`computer to download upgraded versions of software
`already instalied on the target computer; and
`the method further comprises the step of decrypting the
`software using the target computer unique number
`when the version indicator indicates that an upgraded
`version of software already installed on the target
`computer is being broadcast.
`5. The method of claim 1, wherein:
`the message further comprises a vendor header packet
`enabling the target computer to monitor broadcasts for
`software products offered by a vendor.
`6. The method of claim 1, further comprising the steps of:
`decrypting the software in the target computer using the
`target computer unique number;
`determining if there are peripheral computers coupled to
`the target computer to receive the decrypted software;
`and
`
`distributing the decrypted software to the peripheral com-
`puters when there are peripheral computers coupled to
`the target computer to receive the decrypted software.
`7. The method of claim 1, wherein the message further
`comprises a checksum packet for determiningif the target
`computer received the encrypted software without error, and
`the method further comprises the steps of:
`receiving the checksum packetin the target computer;
`processing the checksum packetin the target computer to
`determineif the encrypted software was received with-
`out error;
`providing the target computer information regarding a
`next broadcast of the software when the encrypted
`software was not received without error; and
`waiting for retransmission of the encrypted software.
`8. An apparatus for distributing software encrypted by a
`software encryption key to a target computer, comprising:
`means for receiving a number unique to the target com-
`puter;
`means for encrypting the software encryption key using
`the number unique to the target computer unique num-
`ber;
`meansfor transmitting the encrypted software encryption
`key to the target computer;
`means for communicating a timeslot and channel for
`broadcasting the encrypted software to the target com-
`puter; and
`means for broadcasting a message at the communicated
`timeslot and channel,
`the message comprising the
`encrypted software.
`
`Zynga Ex. 1012, p. 8
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 8
` Zynga v. IGT
` IPR2022-00199
`
`

`

`5,894,516
`
`8
`transmitting the encrypted software encryption key to the
`target computer;
`communicating a timeslot and channel for broadcasting
`the encrypted software to the target computer; and
`broadcasting a messageat the communicated timeslot and
`channel, the message comprising the encrypted soft-
`ware.
`
`7
`9. The apparatus of claim 8, wherein the means for
`providing a timeslot and channel for broadcasting the
`encrypted software to the target computer comprises means
`for periodically scheduling the timeslot according to a user
`request.
`10. The apparatus of claim 8. wherein the means for
`providing a timeslot and channel for broadcasting the
`encrypted software to the target computer comprises means
`for regularly scheduling the transmission time.
`11. The apparatus of claim 8, wherein:
`the message further comprises a version packet notifying
`the target computer that an upgraded version of the
`software is being transmitted and enabling the target
`computer to download upgraded versions of software
`already installed on the target computer; and
`the apparatus further comprises means for decrypting the
`software using the target computer unique number
`when the version indicator indicates that an upgraded
`version of software already installed on the target
`computer is being broadcast.
`12. The apparatus of claim 8.wherein the message further
`comprises a vendor header packet enabling the target com-
`puter to monitor broadcasts for software products offered by
`a vendor.
`13. The apparatus of claim 8. further comprising:
`means for decrypting the software in the target computer
`using the target computer unique number;
`means for determining if there are peripheral computers
`coupled to the target computerto receive the decrypted
`software, and
`
`16. The program storage device of claim 15, wherein the
`broadcast timeslot is periodically scheduled according to a
`user request.
`17. The program storage device of claim 15, wherein the
`transmission timeslot is regularly scheduled.
`18. The program storage device of claim 15, wherein:
`the message further comprises a version packet notifying
`the target computer that an upgraded version of the
`software is being transmitted and enabling the target
`computer to download upgraded versions of software
`already installed on the target computer; and
`the method steps further comprises the method step of
`decrypting the software using the target computer
`unique number when the version indicator indicates
`that an upgraded version of software already installed
`on the target computer is being broadcast.
`19. The program storage device of claim 15, wherein:
`the message further comprises a vendor header packet
`enabling the target computer to monitor broadcasts for
`software products offered by a vendor.
`20. The program storage device of claim 15, wherein the
`means for distributing the decrypted software to the
`method steps further comprise the method steps of:
`peripheral computers when there are peripheral com-
`decrypting the software in the target computer using the
`puters coupled to the target computer to receive the
`decrypted software.
`target computer unique number;
`14. The apparatus of claim 8, wherein the message further
`determining if there are peripheral computers coupled to
`comprises a checksum packet for determining if the target
`the target computer to receive the decrypted software;
`computer received the encrypted software without error, and
`and
`th
`ises:
`
`© apparatus further comprises 49__distributing the decrypted software to the peripheral com-
`means for receiving the checksum packet in the target
`puters when there are peripheral computers coupled to
`computer;
`the target computer to receive the decrypted software.
`means for processing the checksum packet in the target
`21. The program storage device of claim 15, wherein the
`computer to determine if the encrypted software was
`message further comprises a checksum packet for determin-
`received without error;
`ing if the target computer received the encrypted software
`providing the target computer information regarding a
`without error, and the method steps further comprise the
`next broadcast of the software when the encrypted
`method steps of:
`software was not received without error; and
`receiving the checksum packet in the target computer;
`waiting for retransmission of the encrypted software.
`processing the checksum packetin the target computer to
`15. A program storage device. readable by computer, 59
`om
`.
`determineif the encrypted software was received with-
`tangibly embodying one or more programs of instructions
`executable by the computer to perform method steps of
`outerror;
`distributing software encrypted by a software encryption key
`providing the target computer information regarding a
`to a target computer, the method steps comprising the steps
`next broadcast of the software when the encrypted
`of:
`software was not received without error; and
`receiving a number unique to the target computer;
`waiting for retransmission of the encrypted software.
`encrypting the software encryption key using the number
`rd
`unique to the target computer unique number;
`
`—oa
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`Zynga Ex. 1012, p. 9
`Zynga v. IGT
`IPR2022-00199
`
`Zynga Ex. 1012, p. 9
` Zynga v. IGT
` IPR2022-00199
`
`