Broadband certified mail

• US 9,876,769 B2
• Filed: 11/18/2015
• Issued: 01/23/2018
• Est. Priority Date: 04/07/2000
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Rubin, Aviel D.
• Primary Examiner(s): Huynh, Van D
• Application Number:
  US14/944,652
• Publication Number:
  US 20160080330A1
• Time in Patent Office: 797 Days
• Field of Search: 713170
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04L 9/3263 involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823
• CPC Class Codes: H04M 1/72433 for voice messaging, e.g. dictaphones for answering incoming calls H04M1/64

Abstract

The present invention provides a system and method for providing certified voice and/or multimedia mail messages in a broadband signed communication system which uses packetized digital information. Cryptography is used to authenticate a message that has been compiled from streaming voice or multimedia packets. A certificate of the originator'"'"'s identity and electronic signature authenticates the message. A broadband communication system user may be provisioned for certified voice and/or multimedia mail by registering with a certified mail service provider and thereby receiving certification. The called system user'"'"'s CPE electronically signs the bits in received communication packets and returns the message with an electronic signature of the called system user to the calling party, along with the system user'"'"'s certificate obtained from the service provider/certifying authority during registration. The electronic signature is a cryptographic key of the called party.

Claims

1. A method for certifying that an electronic multimedia message comprising digitized information packets was received, comprising:

receiving, by a judging authority server, an electronic document generated by a certifying authority, the electronic document including a user public cryptography key of a user of a destination equipment;

receiving, by the judging authority server, a certified message comprising an encoding of the digitized information packets, the certified message being electronically signed using a user private cryptography key of the user of the destination equipment;

verifying the electronic document by opening the electronic document using a certifying authority public cryptography key of the certifying authority;

verifying the certified message by recovering the digitized information packets from the certified message using the user public cryptography key; and

based on the verifying the electronic document and the verifying the certified message, certifying that the electronic multimedia message was received.

2. The method of claim 1, wherein verifying the certified message further comprises comparing the recovered digitized information packets from the certified message with a digital representation of the electronic multimedia message.

3. The method of claim 1, further comprising:

transmitting a public key query to the certifying authority; and

receiving from the certifying authority, in response to the public key query, the certifying authority public cryptography key.

4. The method according to claim 1, wherein the electronic document generated by the certifying authority further comprises credentials identifying the user of the destination equipment.

5. The method according to claim 1, wherein the electronic document generated by the certifying authority is signed using a certifying authority private cryptography key of the certifying authority.

6. The method according to claim 1, wherein the user private cryptography key and the user public cryptography key are generated by the destination equipment.

7. The method according to claim 1, further comprising:

receiving, by the judging authority server, a request from an originating equipment user to certify that the electronic multimedia message was sent from the originating equipment to the destination equipment, the request including the electronic document and the certified message.

8. A judging authority server for certifying that an electronic multimedia message comprising digitized information packets was received in a wide area network, comprising:

a server processor;

a network interface for connecting the server processor to the wide area network; and

a memory storing server computer readable instructions that, when executed by the server processor, cause the server processor to execute operations comprising;

receiving via the network interface from a user of the originating equipment a complaint comprising

an electronic document generated by a certifying authority and including a user public cryptography key of a user of a destination equipment, and

a certified message including an encoding of the digitized information packets, the certified message being electronically signed using a user private cryptography key of the user of the destination equipment;

verifying the electronic document by opening the electronic document using a certifying authority public cryptography key of the certifying authority;

verifying the certified message by recovering the digitized information packets from the certified message using the user public cryptography key; and

based on the verifying the electronic document and the verifying the certified message, certifying that the electronic multimedia message was received.

9. The judging authority server of claim 8, wherein verifying the certified message further comprises comparing the recovered digitized information packets from the certified message with a digital representation of the electronic multimedia message.

10. The judging authority server of claim 8, wherein the operations further comprise:

transmitting a public key query to the certifying authority; and

receiving from the certifying authority, in response to the public key query, the certifying authority public cryptography key.

11. The judging authority server of claim 8, wherein the electronic document generated by the certifying authority further comprises credentials identifying the user of the destination equipment.

12. The judging authority server of claim 8, wherein the electronic document generated by the certifying authority is signed using a certifying authority private cryptography key of the certifying authority.

13. The judging authority server of claim 8, wherein the user private cryptography key and the user public cryptography key are generated by the destination equipment.

14. A computer-readable storage device having stored thereon computer readable instructions for certifying that an electronic multimedia message was received, wherein execution of the computer readable instructions by a processor causes the processor to perform operations comprising:

receiving a complaint comprising an electronic document signed by a certifying authority and a certified message containing an encoding of the electronic multimedia message;

verifying the electronic document by opening the electronic document using a certifying authority public cryptography key of the certifying authority;

verifying the certified message by recovering the electronic multimedia message using a user public cryptography key of a user of a destination equipment; and

based on the verifying the electronic document and the verifying the certified message, certifying that the electronic multimedia message was received.

15. The computer-readable storage device of claim 14, wherein verifying the certified message further comprises comparing the recovered electronic multimedia message from the certified message with a digital representation of the electronic multimedia message.

16. The computer-readable storage device of claim 14, wherein the operations further comprise:

transmitting a public key query to the certifying authority; and

receiving from the certifying authority, in response to the public key query, the certifying authority public cryptography key.

17. The computer-readable storage device of claim 14, wherein the electronic document comprises credentials identifying the user of the destination equipment and the public cryptography key of a user of the destination equipment.

18. The computer-readable storage device of claim 14, wherein the electronic document is signed using a certifying authority private cryptography key of the certifying authority.

19. The computer-readable storage device of claim 14, wherein the user public cryptography key and a user private cryptography key of the user of the destination equipment are generated by the destination equipment.

20. The computer-readable storage device of claim 14, wherein receiving a complaint further comprises receiving the complaint from a user of an originating equipment that originated the electronic multimedia message.