Method and system for transmitting subscriber identity information, user equipment, network device

A User Equipment (UE), comprising:

• a receiver, configured to receive a subscriber identity request message from a Mobility Management Entity (MME);
• a processor, configured to encrypt an International Mobile Subscriber Identity (IMSI) of the UE to generate a cipher text of the IMSI of the UE after the receiver receives the subscriber identity request message from a network device;
• and
• a transmitter, configured to send a subscriber identity response message to the MME, wherein the subscriber identity response message comprises the cipher text of the IMSI of the UE generated by the processor.

A method for transmitting subscriber identity information, comprising:

• sending a subscriber identity request message to a User Equipment (UE);
• receiving a subscriber identity response message which is sent by the UE, wherein the subscriber identity response message comprises a cipher text of an International Mobile Subscriber Identity (IMSI) of the UE;
• and
• decrypting the cipher text of the IMSI of the UE to obtain the IMSI of the UE.

A network device, comprising:

• a transmitter, configured to send a subscriber identity request message to a User Equipment (UE);
• a receiver, configured to receive a subscriber identity response message which is sent by the UE, wherein the subscriber identity response message comprises a cipher text of an International Mobile Subscriber Identity (IMSI) of the UE;
• and
• a second processing unit, configured to decrypt the cipher text of the IMSI of the UE to obtain the IMSI of the UE.

A network device, comprising:

• a receiver, configured to receive a subscriber identity response message which is sent by a User Equipment (UE) and forwarded by a Mobility Management Entity (MME), wherein the subscriber identity response message includes a cipher text of an International Mobile Subscriber Identity (IMSI) of the UE;
• a processor, configured to decrypt the cipher text of the IMSI of the UE received by the receiver to obtain the IMSI of the UE, and encrypt the IMSI of the UE to generate a cipher text of the IMSI of the UE by using an MME public key and a Home Subscriber Server (HSS) private key which are obtained beforehand;
• and
• a transmitter, configured to send the cipher text of the IMSI of the UE generated by the processor to the MME.

A system for transmitting subscriber identity information, comprising:

• a User Equipment (UE), comprising:
• a receiver, configured to receive a subscriber identity request message from a Mobility Management Entity (MME);
• a processor, configured to encrypt an International Mobile Subscriber Identity (IMSI) of the UE to generate a cipher text of the IMSI of the UE after the receiver receives the subscriber identity request message from a network device;
• and
• a transmitter, configured to send a subscriber identity response message to the MME, wherein the subscriber identity response message comprises the cipher text of the IMSI of the UE generated by the processor;
• and
• at least one of:
• a network device, comprising:
• a network device transmitter, configured to send a subscriber identity request message to the UE;
• a network device receiver, configured to receive a subscriber identity response message which is sent by the UE, wherein the subscriber identity response message comprises a cipher text of the IMSI of the UE;
• and
• a second processing unit, configured to decrypt the cipher text of the IMSI of the UE to obtain the IMSI of the UE;
• and
• a network device, comprising:
• a receiver, configured to receive a subscriber identity response message which is sent by the UE and forwarded by a MME, wherein the subscriber identity response message includes a cipher text of an IMSI of the UE;
• a processor, configured to decrypt the cipher text of the IMSI of the UE received by the receiver to obtain the IMSI of the UE, and encrypt the IMSI of the UE to generate a cipher text of the IMSI of the UE by using an MME public key and a Home Subscriber Server (HSS) private key which are obtained beforehand;
• and
• a transmitter, configured to send the cipher text of the IMSI of the UE generated by the processor to the MME.