Communication method and device

• US 10,595,198 B2
• Filed: 06/29/2018
• Issued: 03/17/2020
• Est. Priority Date: 08/31/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: He, Chengdong
• Primary Examiner(s): Avery, Jeremiah L
• Application Number:
  US16/023,324
• Publication Number:
  US 20180310170A1
• Time in Patent Office: 627 Days
• Field of Search: None
• CPC Class Codes: H04L 2463/061 applying further key derivation, e.g. deriving traffic keys from a pair-wise master key cryptographic mechanisms or cryptographic arrangements for generation of secret information including derivation or calculation of cryptographic keys or passwords H04L9/0861
• CPC Class Codes: H04L 63/0492 by using a location-limited connection, e.g. near-field communication or limited proximity of entities
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819
• CPC Class Codes: H04L 63/0876 based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
• CPC Class Codes: H04L 63/1441 Countermeasures against malicious traffic countermeasures against attacks on cryptographic mechanisms H04L9/002
• CPC Class Codes: H04L 63/20 for managing network security; network security policies in general filtering policies H04L63/0227
• CPC Class Codes: H04L 63/205 involving negotiation or determination of the one or more network security mechanisms to be used, e.g. by negotiation between the client and the server or between peers or by selection according to the capabilities of the entities involved negotiation of communication capabilities H04L69/24
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 9/0844 with user authentication or key authentication, e.g. ElGamal, MTI, MQV-Menezes-Qu-Vanstone protocol or Diffie-Hellman protocols using implicitly-certified keys
• CPC Class Codes: H04L 9/088 Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms network architectures or network communication protocols for using time-dependent keys in a packet data network H04L63/068
• CPC Class Codes: H04W 12/041 Key generation or derivation
• CPC Class Codes: H04W 12/0431 Key distribution or pre-distribution; Key agreement
• CPC Class Codes: H04W 12/106 Packet or message integrity
• CPC Class Codes: H04W 12/122 Counter-measures against attacks; Protection against rogue devices
• CPC Class Codes: H04W 36/0038 of security context information
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Abstract

A communication method includes receiving by a SGSN a context request message from a mobility management entity (MME), obtaining by the SGSN an authentication vector-related key, and calculating by the SGSN a root key according to the authentication vector-related key. In addition, the method further includes sending by the SGSN a context response message including the root key to the MME, wherein the MME derives a NAS protection key according to the root key.

Claims

1. A mobility management entity (MME) performing security negotiation for idle state mobility of a user equipment (UE) from a third generation (3G) network to a long term evolution (LTE) network, comprising:

a receiver configured to receive from the UE security capabilities of the UE including non-access stratum (NAS) security capabilities of the UE, and receive an authentication vector-related key from a service general packet radio service (GPRS) support node (SGSN) in the 3G network;

a processor configured to derive a root key with the authentication vector-related key, select a NAS security algorithm supported by the NAS security capabilities of the UE, and derive a NAS protection key with the selected NAS security algorithm and the root key; and

a transmitter configured to send a message that indicates the selected NAS security algorithm to the UE.

2. The MME of claim 1, wherein the receiver is configured to receive the NAS security capabilities of the UE through a tracking area update (TAU) request message.

3. The MME of claim 1, wherein the message that indicates the selected NAS security algorithm is a NAS security mode command message.

4. The MME of claim 1, wherein the message that indicates the selected NAS security algorithm is a tracking area update (TAU) accept message.

5. The MME of claim 1, wherein the processor is further configured to protect the message that indicates the selected NAS security algorithm with the derived NAS protection key.

6. The MME of claim 1, wherein the authentication vector-related key includes an integrity key (IK) and an encryption key (CK).

7. The MME of claim 2, wherein the message that indicates the selected NAS security algorithm is a NAS security mode command message.

8. The MME of claim 7, wherein the receiver is configured to receive the authentication vector-related key through a context response message.

9. The MME of claim 8, wherein the processor is further configured to protect the message that indicates the selected NAS security algorithm with the derived NAS protection key.

10. The MME of claim 9, wherein the authentication vector-related key includes an integrity key (IK) and an encryption key (CK).

11. A communications system that provides security negotiation for idle state mobility of a user equipment (UE) from a third generation (3G) network to a long term evolution (LTE) network, the system comprising:

a service general packet radio service (GPRS) support node (SGSN) in the 3G network and a mobility management entity (MME) in the LTE network, wherein

the SGSN is configured to send an authentication vector-related key to the MME; and

the MME is configured to receive security capabilities of the UE including non-access stratum (NAS) security capabilities of the UE from the UE, derive a root key with the authentication vector-related key, select a NAS security algorithm supported by the NAS security capabilities of the UE, send a message that indicates the selected NAS security algorithm to the UE, and derive a NAS protection key with the selected NAS security algorithm and the root key.

12. The system of claim 11, wherein the MME is configured to receive the NAS security capabilities of the UE in a tracking area update (TAU) request message.

13. The system of claim 11, wherein the message that indicates the selected NAS security algorithm is one of a NAS security mode command message and a tracking area update (TAU) accept message.

14. The system of claim 11, wherein the MME is further configured to protect the message that indicates the selected NAS security algorithm with the derived NAS protection key.

15. The system of claim 11, wherein the authentication vector-related key includes an integrity key (IK) and an encryption key (CK).

16. The system of claim 11, wherein the SGSN is configured to send the authentication vector-related key through a context response message.

17. The system of claim 12, wherein the message that indicates the selected NAS security algorithm is a NAS security mode command message.

18. The system of claim 17, wherein the SGSN is configured to send the authentication vector-related key through a context response message.

19. The system of claim 18, wherein the MME is further configured to protect the message that indicates the selected NAS security algorithm with the derived NAS protection key.

20. The system of claim 19, wherein the authentication vector-related key includes an integrity key (IK) and an encryption key (CK).