Secure communication system and method for integrated mobile communication terminals comprising a short-distance communication module

• US 7,284,123 B2
• Filed: 01/13/2004
• Issued: 10/16/2007
• Est. Priority Date: 01/14/2003
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Hoe-Won
• Primary Examiner(s): Peeso; Thomas R.
• Application Number:
  US10/756,618
• Publication Number:
  US 20040147246A1
• Time in Patent Office: 1,372 Days
• Field of Search: 713/163, 713/168, 713/171
• US Class Current: 713/163
• CPC Class Codes: H04L 2209/80 Wireless
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0492 by using a location-limited connection, e.g. near-field communication or limited proximity of entities
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/0838 Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these network architectures or network communication protocols for key exchange in a packet data network H04L63/061
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks

Abstract

Disclosed is an encryption code for encrypting data to be transmitted or received during short-distance communication, namely, an encryption key generator for generating an encryption key, in order to transmit the encryption key to an integrated mobile communication terminal and a service terminal during short-distance secure communication. The two terminals encrypt data using the encryption key and receive or transmit the data, thereby implementing authentication and secure communication.

Claims

1. A method for short-distance wireless secure communication between communication terminals comprising a short-distance wireless communication module, said method comprising the steps of:

demanding generation of an encryption key for short-distance wireless secure communication between one communication terminal and another communication terminal;

generating an encryption key and a corresponding key ID according to the demand for encryption key generation and transmitting the encryption key and the key ID to both communication terminals via a secure connection wherein said encryption key and said key ID are transmitted in an exclusive encryption key transmitting message; and

encrypting and decrypting data transmitted through short-distance wireless communication using the encryption key received by both communication terminals.

2. The method according to claim 1, wherein, when an encryption key is generated according to said demand for encryption key generation, a key ID corresponding to the encryption key is also generated.

3. A method for short-distance wireless secure communication between an integrated mobile communication terminal and a service providing terminal generating an encryption key, through short-distance wireless communication modules provided in both terminals, said method comprising the steps of:

said integrated mobile communication terminal'"'"'s demanding a service from said service providing terminal through short-distance wireless communication;

said service providing terminal'"'"'s demanding a number of said integrated mobile communication terminal, generating an encryption key and a corresponding key ID upon receiving the number and demanding transmission thereof;

transmitting the encryption key and the key ID to said integrated mobile communication terminal via a secure connection according to said demand for transmission;

said integrated mobile communication terminal'"'"'s receiving and storing the encryption key and the key ID;

said service providing terminal'"'"'s transmitting the key ID through short-distance wireless communication and demanding secure communication; and

said integrated mobile communication terminal'"'"'s detecting an encryption key corresponding to the received key ID, among a plurality of encryption key stored therein, encrypting data using the detected encryption key and transmitting the data to implement secure communication.

4. A method for short-distance wireless secure communication in a mobile communication system which comprises an integrated mobile communication terminal comprising a short-distance wireless communication module, a service providing server and an encryption key generating server, said method comprising the steps of:

said integrated mobile communication terminal'"'"'s demanding a service from said service providing server through short-distance wireless communication;

said service providing server'"'"'s demanding a number of said integrated mobile communication terminal, transmitting the number upon receipt to said encryption key generating server and demanding generation of an encryption key;

said encryption key generating servers'"'"'s receiving said number, generating an encryption key and a corresponding key ID upon said demand for generation and transmitting the encryption key and the key ID to said integrated mobile communication terminal and said service providing server via a secure connection;

said service providing server'"'"'s transmitting the key ID through short-distance wireless communication and demanding secure communication; and

said integrated mobile communication terminal'"'"'s detecting an encryption key corresponding to the key ID which has been received, among a plurality of encryption keys stored therein, encrypting data using the detected encryption key and transmitting the data.

5. The method according to claim 4, wherein said encryption key and said key ID are transmitted in a short message form.

6. The method according to claim 4, wherein said encryption key and said key ID are transmitted in a call incoming message.

7. The method according to claim 4, wherein said encryption key and said key ID are transmitted in an exclusive encryption key transmitting message.

8. A short-distance wireless secure communication system comprising:

an integrated mobile communication terminal, which comprises a short-distance wireless communication module, for demanding generation of an encryption key, if secure communication is required during short-distance communication between said integrated mobile communication terminal and another terminal, and for encrypting and decrypting data received or transmitted during short-distance wireless communication with the other terminal using an encryption key which has been received via a secure connection; and

an encryption key generator for generating an encryption key and a key ID according to the demand for encryption key generation and transmitting the encryption key and the key ID to the integrated mobile communication terminal and the other terminal wherein said encryption key and said key ID are transmitted in an exclusive encryption key transmitting message.

9. A short-distance wireless secure communication system comprising:

a mobile communication system;

an integrated mobile communication terminal comprising;

a short-distance wireless communication section;

a mobile communication section; and

an encryption processing section for storing an encryption key received from said mobile communication system and a key ID corresponding to said encryption key, detecting an encryption key corresponding to the key ID received through short-distance wireless communication, encrypting data inputted from said mobile communication section using the detected encryption key in order to output the encrypted data to said short-distance wireless communication section, and decrypting data inputted from said short-distance wireless communication section in order to output the decrypted data to said mobile communication section; and

a service providing terminal comprising;

an encryption key generating section for generating and storing a plurality of encryption keys and a plurality of corresponding key IDs, and selecting and outputting an encryption key and a key ID among the stored encryption keys and key IDs;

a mobile communication section for transmitting the encryption key and key ID outputted from said encryption key generation section;

a short-distance wireless communication section for transmitting said key ID; and

a service providing section for encrypting data to be sent during secure communication using the encryption key outputted from said encryption key generating section and decrypting the encrypted data received through said short-distance wireless communication section.

10. A short-distance wireless secure communication system comprising:

a mobile communication system;

an integrated mobile communication terminal comprising;

a short-distance wireless communication section;

a mobile communication section; and

an encryption processing section for storing an encryption key received from said mobile communication system and a key ID corresponding to said encryption key, detecting an encryption key corresponding to the key ID received through short-distance wireless communication, encrypting data to be sent during secure communication using the detected encryption key in order to output the encrypted data to said short-distance wireless communication section, and decrypting data inputted from said short-distance wireless communication section in order to output the decrypted data to said mobile communication section;

an encryption key generating server for generating and storing a plurality of encryption keys and a plurality of corresponding key IDs, and selecting an encryption key and a key ID among the stored encryption keys and key IDs to output them through said mobile communication system; and

a service providing server for storing an encryption key and a key ID received from said mobile communication system, transmitting the key ID through short-distance communication section, encrypting data to be sent during secure communication using said encryption key, transmitting the encrypted data outputted through said short-distance communication section, and decrypting the encrypted data received from said short-distance wireless communication section.

11. A method for short-distance wireless secure communication between a mobile communication terminal and a service providing terminal generating an encryption key, through short-distance wireless communication modules provided in both terminals, said method comprising the steps of:

said mobile communication terminal'"'"'s demanding a service from said service providing terminal through short-distance wireless communication;

said service providing terminal'"'"'s generating an encryption key and a corresponding key ID according to said demand for service and transmitting the encryption key and the key ID to said mobile communication terminal via a predetermined secure channel;

said service providing terminal'"'"'s transmitting the key ID to said communication terminal through short-distance wireless communication and demanding secure communication; and

said mobile communication terminal'"'"'s encrypting and decrypting service data in short-distance wireless communication using an encryption key corresponding to said received key ID.