Method and apparatus for the secure storage of audio signals

• US 7,519,836 B2
• Filed: 07/18/2005
• Issued: 04/14/2009
• Est. Priority Date: 08/19/1997
• Status: Expired due to Fees

• Current Assignee: RPX Corporation
• Original Assignee: Walker Digital LLC (Walker Innovation Inc. (f/k/a Patent Properties, Inc.))
• Inventors: Sparico, Thomas M., Walker, Jay S., Jorasch, James A.
• Primary Examiner(s): Revak, Christopher A
• Application Number:
  US11/183,359
• Publication Number:
  US 20050265554A1
• Time in Patent Office: 1,366 Days
• Field of Search: None
• US Class Current: 713/194
• CPC Class Codes: H04K 1/00 Secret communication
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 9/0819 Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) network architectures or network communication protocols for key distribution in a packet data network H04L63/062
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/3226 using a predetermined code, e.g. password, passphrase or PIN network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L63/083
• CPC Class Codes: H04M 2203/258 Service state indications
• CPC Class Codes: H04M 2203/301 Management of recordings
• CPC Class Codes: H04M 2203/6009 Personal information, e.g. profiles or personal directories being only provided to authorised persons
• CPC Class Codes: H04M 2203/609 Secret communication
• CPC Class Codes: H04M 3/38 Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections queuing arrangements H04Q3/64
• CPC Class Codes: H04M 3/382 using authorisation codes or passwords
• CPC Class Codes: H04M 3/42221 Conversation recording systems at the subscriber's set H04M1/656
• CPC Class Codes: H04M 3/51 Centralised call answering arrangements requiring operator intervention , e.g. call or contact centers for telemarketing
• CPC Class Codes: H04M 7/0078 Security; Fraud detection; Fraud prevention

Abstract

A method and apparatus for recording audio so that the recording can be authenticated as to both content and time of recording is provided. The system may be implemented as a central server that is accessed via one or more telephone lines, or as a stand-alone unit. The system operates by encrypting audio information, storing the encrypted information, and providing users with a cryptographic key that can be used to decrypt the stored information. Preferably, time stamps are embedded in the stored information. Digital signatures may be used to provide additional security.

Claims

1. A method comprising:

establishing communication between at least two parties;

determining data communicated between the at least two parties;

encoding, by a cryptographic processor, the communicated data;

storing the encoded communicated data;

generating, by the cryptographic processor, a key for decoding the encoded communicated data;

transmitting the key to each of the at least two parties;

generating, by the cryptographic processor, a first access code that can be used to obtain access to the stored encoded communicated data; and

transmitting the first access code to a first party of the at least two parties.

2. The method of claim 1, further comprising:

generating, by the cryptographic processor, a second access code that can be used to obtain access to the encoded communicated data; and

transmitting the second access code to a second party of the at least two parties,

in which the second access code is different than the first access code, and

in which the second party is different than the first party.

3. The method of claim 1, wherein the communicated data comprises an audio signal, and wherein the encoded communicated data comprises an encoded audio signal.

4. The method of claim 1, further comprising:

associating the first access code with the encoded communicated data.

5. The method of claim 1, in which establishing communication comprises:

establishing a telephone connection between a calling party and a called party.

6. The method of claim 1, in which establishing communication comprises:

establishing an audio connection between a calling party and a called party.

7. The method of claim 1, in which the communicated data comprises an audio signal.

8. The method of claim 1, in which encoding the communicated data comprises:

encrypting, by the cryptographic processor, the communicated data.

9. The method of claim 1, further comprising:

receiving the access code from the first party;

receiving the key from the first party;

decoding, by the cryptographic processor, the encoded communicated data using the received key; and

transmitting the decoded communicated data to the first party.

10. The method of claim 9, further comprising:

storing an indication that the decoded communicated data has been transmitted to the first party.

11. The method of claim 9, further comprising:

verifying the received access code; and

verifying the received key.

12. The method of claim 1, in which the first access code comprises a timestamp associated with the communicated data.

13. A computer readable medium storing instructions configured to direct a processor to perform the method of claim 1.

14. An apparatus comprising:

a processor; and

the computer readable medium of claim 13 in communication with the processor.

15. A method comprising:

establishing communication between at least two parties;

storing data communicated between the at least two parties;

encoding, by a cryptographic processor, the stored communicated data;

generating, by the cryptographic processor, a first key for decoding the stored encoded communicated data;

generating, by the cryptographic processor, a second key for decoding the stored encoded communicated data, the second key being different from the first key;

transmitting the first key to a first party of the at least two parties;

transmitting the second key to a second party of the at least two parties;

generating, by the cryptographic processor, an access code that can be used to obtain access to the stored encoded communicated data;

transmitting the access code to each of the at least two parties;

receiving the access code and the first key from the first party;

decoding, by the cryptographic processor, the stored encoded communicated data using the received first key; and

outputting the decoded communicated data.

16. The method of claim 15, in which the communicated data comprises a digitized audio file.

17. The method of claim 15, further comprising:

associating the access code with each of the first key and the second key.

18. The method of claim 15, in which receiving comprises:

receiving the access code and the first key from a communication device.

19. The method of claim 18, in which the communication device comprises a telephone.

20. The method of claim 18, in which the communication device comprises a computer.

21. A computer readable medium storing instructions configured to direct a processor to perform the method of claim 15.

22. An apparatus comprising:

a processor; and

the computer readable medium of claim 21 in communication with the processor.

23. A method comprising:

receiving communication data;

encrypting, by a cryptographic processor, the communication data;

storing the encrypted communication data;

retrieving a key for decrypting the encrypted communication data;

transmitting the key to a first party;

generating a message identifier;

transmitting the message identifier to each of the first party and a second party;

receiving the message identifier and the key from the first party;

decrypting, by the cryptographic processor, the stored encrypted communication data based on the received key; and

providing the decrypted communication data to the first party.

24. A computer readable medium storing instructions configured to direct a processor to perform the method of claim 23.

25. An apparatus comprising:

a processor; and

the computer readable medium of claim 24 in communication with the processor.