Dynamic key exchange for call forking scenarios

• US 20080123849A1
• Filed: 09/21/2006
• Published: 05/29/2008
• Est. Priority Date: 09/21/2006
• Status: Active Grant

• Current Assignee: RingCentral Incorporated
• Original Assignee: Siemens Enterprise Communications, Inc. (Atos SE)
• Inventors: Prange, Holger, Ruetschi, Johannes, Kucmerowski, Dennis L., Samayamantry, Mallikarjuna
• Granted Patent: US 8,249,238 B2
• Time in Patent Office: Days
• US Class Current: 380/255
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04M 7/0078 Security; Fraud detection; Fraud prevention

Abstract

In some embodiments, a call forking dynamic key exchange system may include one or more of the following features: (a) a memory comprising, (i) a dynamic key exchange program that allows a caller to initiate a call having a security request to multiple subscribers and selecting at least one subscriber who answers the call, and (b) a processor coupled to the memory that executes the dynamic key exchange program.

Claims

1. A call forking dynamic key exchange system comprising:

a memory comprising;

a dynamic key exchange program that allows a caller to initiate a call having a security request to multiple subscribers and selecting at least one subscriber who answers the call, wherein the security request is a first half of a security key and a second half of the key is only received after call establishment from an answering subscriber; and

a processor coupled to the memory that executes the dynamic key exchange program.

2. The system of claim 1, wherein the call is placed on a SIP network.

3. The system of claim 1, wherein the call to un-answering subscribers is terminated.

6. The system of claim 1, wherein an unsecured speech path is created before a secure media is established.

7. The system of claim 6, wherein the program detects the unsecured speech path.

4. (canceled)

5. (canceled)

8. A method for securing multiple-call telecommunications, the method comprising the steps of:

placing a call with a first half of a security key to multiple subscribers;

receiving a response from at least one answering subscriber;

terminating the call to all non-answering subscribers;

receiving a second half component of a security key from the one answering subscriber is only received after call establishment;

detecting an indicator to begin secure communications; and

initiating secure media communication after said indicator has been detected.

9. The method of claim 8, further comprising the step of determining if the at least one answering subscriber has answered.

12. The method of claim 8, wherein the response from at least one answering subscriber answers without a security key.

13. The method of claim 8, wherein the call is placed over a SIP network.

10. (canceled)

11. (canceled)

14. A machine readable medium comprising machine executable instructions, including:

call instructions that route a call to multiple subscribers;

termination instructions that terminate the call to all non-answering subscribers; and

secure instructions that initiate secure media communications based upon an answering subscriber'"'"'s portion of a security key have been received after establishment of the call.

15. The medium of claim 14, wherein the call contains a first half of a caller'"'"'s security key.

16. The medium of claim 14, wherein the call occurs over a SIP network.

17. The medium of claim 16, wherein the call is placed on a SIP enabled device.

18. The medium of claim 14, wherein the answering subscriber'"'"'s security key is a second half of a security key.

19. The medium of claim 14, wherein an unsecured speech path is created before the secure media communications.

20. The medium of claim 19, further comprising detect instructions that detect when the unsecured speech path has been created.