TECHNIQUES FOR ENSURING AUTHENTICATION AND INTEGRITY OF COMMUNICATIONS

• US 20150163058A1
• Filed: 01/12/2015
• Published: 06/11/2015
• Est. Priority Date: 06/26/2008
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Hsu, Wen-Pin Scott, Soulami, Tarik, Zagorski, Mark, Zhang, Ning, Perlman, Brian
• Granted Patent: US 9,847,880 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 21/121 Restricting unauthorised execution of programs
• CPC Class Codes: G06F 21/125 by manipulating the program code, e.g. source code, compiled code, interpreted code, machine code
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/608 Secure printing
• CPC Class Codes: G06F 2221/2103 Challenge-response
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/0869 for achieving mutual authentication cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 9/08 Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords network architectures or network communication protocols for supporting key management in a packet data network H04L63/06
• CPC Class Codes: H04L 9/30 Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
• CPC Class Codes: H04L 9/32 including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
• CPC Class Codes: H04L 9/3242 involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04M 3/16 with lock-out or secrecy provision in party-line systems
• CPC Class Codes: H04W 12/06 Authentication

Abstract

Techniques are described for ensuring data integrity and authentication of received messages. One technique includes sending a request from a first module to a second module in which the request includes a first portion that is a shared secret encrypted with a public key, obtaining by the second module a private key from a secure and trusted information store, such as a license information store, including license information or other application specific information for the first module, using the private key to decrypt the first portion and obtain the shared secret, sending a response from the second module to the first module in which the response includes authentication data and at least one data item used with the shared secret to determine the authentication data, and performing by the first module verification processing to verify the authentication data included in the response.

Claims

1. A computer-implemented communication method comprising:

sending a request from a first module to a second module, the request comprising a first portion that is a shared secret encrypted with a public key of an asymmetric key pair, the request comprising a second portion identifying a right associated with the request, the shared secret comprising a session key associated with a communication session between the first module and the second module, the session key having a size in a range of bytes and generated based upon the public key and a current time; and

receiving a response to the request from the second module, the response comprising authentication data based upon the shared secret, a token that is unique for the response, and a version number associated with an application corresponding to the request.

2. The method of claim 1, the sending a request comprising:

sending the request from a first computer comprising the first module.

3. The method of claim 1, the sending a request comprising:

sending the request to a second computer comprising the second module.

4. The method of claim 1, the receiving a response comprising:

receiving the response comprising encrypted data.

5. The method of claim 1, the receiving a response comprising:

receiving the response comprising an encrypted hash value.

6. The method of claim 1, comprising:

performing verification processing of at least some of the response.

7. The method of claim 1, comprising:

performing verification processing of the authentication data using the public key.

8. A system comprising:

one or more processing units; and

memory comprising instructions that when executed by at least one of the one or more processing units perform a method comprising;

sending a request from a first module to a second module;

receiving a response to the request from the second module, the response comprising a digital signature formed using a private key of an asymmetric key pair and at least one data item; and

performing, by the first module, verification processing using a public key of the asymmetric key pair to verify the digital signature comprised in the response.

9. The system of claim 8, the receiving a response comprising:

receiving the response comprising a hash value encrypted using the private key.

10. The system of claim 8, the performing the verification processing comprising:

computing a hash value using the at least one data item; and

using the public key of the asymmetric key pair to verify the hash value against the digital signature comprised in the response.

11. The system of claim 9, the hash value comprising a version number and at least one of a nonce or response data.

12. The system of claim 8, the asymmetric key pair from a license information store comprising license information.

13. The system of claim 8, the sending a request comprising:

sending the request from a first computer comprising the first module.

14. The system of claim 8, the sending a request comprising:

sending the request to a second computer comprising the second module.

15. A computer readable storage medium comprising executable code stored thereon for:

sending a request from a first module to a second module, the request comprising a first portion that is a shared secret encrypted with a public key of an asymmetric key pair, the request comprising a second portion identifying a right associated with the request, the shared secret comprising a session key associated with a communication session between the first module and the second module, the session key generated based upon the public key; and

receiving a response to the request from the second module, the response comprising authentication data based upon the shared secret and a token.

16. The computer readable storage medium of claim 15, the sending a request comprising:

sending the request from a first computer comprising the first module to a second computer comprising the second module.

17. The computer readable storage medium of claim 15, the receiving a response comprising:

receiving the response comprising encrypted data.

18. The computer readable storage medium of claim 15, the receiving a response comprising:

receiving the response comprising an encrypted hash value.

19. The computer readable storage medium of claim 15, comprising executable code stored thereon for:

performing verification processing of at least some of the response.

20. The computer readable storage medium of claim 15, comprising executable code stored thereon for:

performing verification processing of the authentication data using the public key.