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Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 1 of 6
`Case 4:18-cv-07229—YGR Document 198-5 Filed 05/18/21 Page 1 of 6
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`EXHIBIT D
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`EXHIBIT D
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`

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`Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 2 of 6
`Case 4:18-cv-07229—YGR Document 198-5 Filed 05/18/21 Page 2 of 6
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`APPENDIX F
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`APPENDIX F
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`Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 3 of 6
`
`US Patent No. 8,225,408
`Method and System for Adaptive Rule-based Content Scanners
`Claim 1
`
`1
`
`The Qualys Accused Products perform a multi‐lingual method for scanning incoming 
`program code that a user attempts to download from the Internet.  The program 
`code is diverted to the Accused Products for analysis if the program code appears 
`suspicious or is of a certain file type.  Each Accused Product performs static, 
`dynamic and behavioral analysis of received downloaded program code to identify 
`exploits, and uses internal databases (as described below) to parse and analyze 
`program code to detect exploits indicating that the program code is suspicious or 
`malicious.
`
`1a. A computer processor‐based multi‐lingual method for scanning 
`incoming program code, comprising:
`
`1b. receiving, by a computer, an incoming stream of program
`code;
`
`1c. determining, by the computer, any specific one of a plurality of 
`programming languages in which the incoming stream is written;
`
`1d. instantiating, by the computer, a scanner for the specific 
`programming language, in response to said determining, the 
`scanner comprising parser rules and analyzer rules for the specific 
`programming language, wherein the parser rules define certain 
`patterns in terms of tokens, tokens being lexical constructs for the 
`specific programming language, and wherein the analyzer rules 
`identify certain combinations of tokens and patterns as being 
`indicators of potential exploits, exploits being portions of program 
`code that are malicious;
`
`1e. identifying, by the computer, individual tokens within the 
`incoming stream;
`
`1f. dynamically building, by the computer while said receiving 
`receives the incoming stream, a parse tree whose nodes represent 
`tokens and patterns in accordance with the parser rules;
`
`1g. dynamically detecting, by the computer while said dynamically 
`building builds the parse tree, combinations of nodes in the parse 
`tree which are indicators of potential exploits, based on the 
`analyzer rules; and
`
`1h. indicating, by the computer, the presence of potential exploits 
`within the incoming stream, based on said dynamically detecting.
`
`1
`
`© 2018 Finjan, Inc. ALL RIGHTS RESERVED
`Subject to FRE 408
`
`

`

`Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 4 of 6
`
`US Patent No. 8,225,408
`Method and System for Adaptive Rule-based Content Scanners
`Claim 1
`1a. A computer processor‐based multi‐lingual method for scanning 
`incoming program code, comprising:
`
`1b. Contention 1 – The Accused Products, each resident on the Qualys Cloud, 
`receive an incoming stream of computer code
`
`2
`
`1b. receiving, by a computer, an incoming stream of program
`code;
`
`1c. determining, by the computer, any specific one of a plurality of 
`programming languages in which the incoming stream is written;
`
`1d. instantiating, by the computer, a scanner for the specific 
`programming language, in response to said determining, the 
`scanner comprising parser rules and analyzer rules for the specific 
`programming language, wherein the parser rules define certain 
`patterns in terms of tokens, tokens being lexical constructs for the 
`specific programming language, and wherein the analyzer rules 
`identify certain combinations of tokens and patterns as being 
`indicators of potential exploits, exploits being portions of program 
`code that are malicious;
`
`1e. identifying, by the computer, individual tokens within the 
`incoming stream;
`
`1f. dynamically building, by the computer while said receiving 
`receives the incoming stream, a parse tree whose nodes represent 
`tokens and patterns in accordance with the parser rules;
`
`1g. dynamically detecting, by the computer while said dynamically 
`building builds the parse tree, combinations of nodes in the parse 
`tree which are indicators of potential exploits, based on the 
`analyzer rules; and
`
`1h. indicating, by the computer, the presence of potential exploits 
`within the incoming stream, based on said dynamically detecting.
`
`Each of the Accused Products, executed on a node that is part of the Qualys Cloud 
`computing environment, includes a receiver component on a node that receives 
`content based on a client device requesting the content from a source computer, 
`such as the Internet.  As shown below, the content is received by each Accused 
`Product, (via the receiver) when a particular client device requests content provided 
`by a source computer.  
`
`2
`
`© 2018 Finjan, Inc. ALL RIGHTS RESERVED
`Subject to FRE 408
`
`

`

`Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 5 of 6
`
`US Patent No. 8,225,408
`Method and System for Adaptive Rule-based Content Scanners
`Claim 1
`
`3
`
`1a. A computer processor‐based multi‐lingual method for scanning 
`incoming program code, comprising:
`
`1b. Contention 2 – The Accused Products, each resident on Appliance Scanners, 
`receive an incoming stream of computer code
`
`1b. receiving, by a computer, an incoming stream of program
`code;
`
`1c. determining, by the computer, any specific one of a plurality of 
`programming languages in which the incoming stream is written;
`
`1d. instantiating, by the computer, a scanner for the specific 
`programming language, in response to said determining, the 
`scanner comprising parser rules and analyzer rules for the specific 
`programming language, wherein the parser rules define certain 
`patterns in terms of tokens, tokens being lexical constructs for the 
`specific programming language, and wherein the analyzer rules 
`identify certain combinations of tokens and patterns as being 
`indicators of potential exploits, exploits being portions of program 
`code that are malicious;
`
`1e. identifying, by the computer, individual tokens within the 
`incoming stream;
`
`1f. dynamically building, by the computer while said receiving 
`receives the incoming stream, a parse tree whose nodes represent 
`tokens and patterns in accordance with the parser rules;
`
`1g. dynamically detecting, by the computer while said dynamically 
`building builds the parse tree, combinations of nodes in the parse 
`tree which are indicators of potential exploits, based on the 
`analyzer rules; and
`
`1h. indicating, by the computer, the presence of potential exploits 
`within the incoming stream, based on said dynamically detecting.
`
`Each of the Accused Products executed on Appliance Scanners, dispersed over a 
`computer network, includes a receiver component that receives content based on a 
`client device requesting the content from a source computer, such as the Internet.  
`As shown below, the content is received by each Accused Product (via the receiver 
`of the Appliance Scanner) when a particular client device requests content provided 
`by a source computer.  
`
`3
`
`© 2018 Finjan, Inc. ALL RIGHTS RESERVED
`Subject to FRE 408
`
`

`

`Case 4:18-cv-07229-YGR Document 198-5 Filed 05/18/21 Page 6 of 6
`
`US Patent No. 8,225,408
`Method and System for Adaptive Rule-based Content Scanners
`Claim 1
`1a. A computer processor‐based multi‐lingual method for scanning 
`incoming program code, comprising:
`
`1b. Contention 2 – The Accused Products, each resident on Appliance Scanners, 
`receive an incoming stream of computer code (continued)
`
`4
`
`1b. receiving, by a computer, an incoming stream of program
`code;
`
`1c. determining, by the computer, any specific one of a plurality of 
`programming languages in which the incoming stream is written;
`
`1d. instantiating, by the computer, a scanner for the specific 
`programming language, in response to said determining, the 
`scanner comprising parser rules and analyzer rules for the specific 
`programming language, wherein the parser rules define certain 
`patterns in terms of tokens, tokens being lexical constructs for the 
`specific programming language, and wherein the analyzer rules 
`identify certain combinations of tokens and patterns as being 
`indicators of potential exploits, exploits being portions of program 
`code that are malicious;
`
`1e. identifying, by the computer, individual tokens within the 
`incoming stream;
`
`1f. dynamically building, by the computer while said receiving 
`receives the incoming stream, a parse tree whose nodes represent 
`tokens and patterns in accordance with the parser rules;
`
`1g. dynamically detecting, by the computer while said dynamically 
`building builds the parse tree, combinations of nodes in the parse 
`tree which are indicators of potential exploits, based on the 
`analyzer rules; and
`
`1h. indicating, by the computer, the presence of potential exploits 
`within the incoming stream, based on said dynamically detecting.
`
`As shown below, Scanner Appliances dispersed as endpoints throughout a 
`computer network, receive content based on a client device requesting the content 
`from a source computer, such as the Internet.  
`
`receiver
`
`4
`
`© 2018 Finjan, Inc. ALL RIGHTS RESERVED
`Subject to FRE 408
`
`

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