Method for generating a password using public key cryptography

• US 5,398,285 A
• Filed: 12/30/1993
• Issued: 03/14/1995
• Est. Priority Date: 12/30/1993
• Status: Expired due to Term

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Borgelt, Kenneth B., Mayer, Glenn N.
• Primary Examiner(s): Cain, David C.
• Application Number:
  US08/175,467
• Time in Patent Office: 439 Days
• Field of Search: 380/30, 380/23, 380/21, 380/25, 380/28, 380/4
• US Class Current: 380/30
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/629 to features or functions of an application
• CPC Class Codes: G07C 9/33 by means of a password
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• 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 63/083 using passwords cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226
• CPC Class Codes: H04L 9/3226 using a predetermined code, e.g. password, passphrase or PIN network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L63/083

Abstract

In a communication system, a password that enables an embedded software program within a base station can be generated using public key cryptography in the following manner. A system controller (103) obtains a unique identification code and an embedded software code for the base station (101). Once obtained, the system controller (103) encrypts the unique identification code and the embedded software code using a private key to produce a password. The password is transferred to the base station (101) where, upon receipt, is decrypted using a public key to produce the unique identification code and the embedded software code. The base station (101) compares the unique identification code and an embedded unique identification code (107) and, when they substantially match, the base station (101) stores the password.

Claims

1. In a communication system, a method for using public key cryptography to generate a password that enables an embedded software program within a base station, the method comprises the steps of:

a) obtaining, by a system controller, a unique identification code for the base station and an embedded software code;

b) encrypting, by the system controller, the unique identification code and the embedded software code, via a private key, to produce the password;

c) transferring, by the system controller, the password to the base station;

d) upon receiving the password, decrypting, by the base station via a public key, the password to produce the unique identification code and the embedded software code;

e) comparing, by the base station, the unique identification code with an embedded unique identification code; and

f) when the unique identification code and the embedded unique identification code substantially match, storing, by the base station, the password.

2. The method of claim 1 further comprises the step of, when the unique identification code and the embedded unique identification code do not substantially match, indicating, by the base station, that the unique identification code and the embedded unique identification code do not substantially match.

3. The method of claim 1 further comprises, prior to the encryption of step (b), combining the embedded software code and the unique identification code.

4. In the method of claim 3, the combination of the embedded software code and the unique identification code further comprises concatenating the embedded software code and the unique identification code.

5. In the method of claim 3, the combination of the embedded software code and the unique identification code further comprises exclusive OR'"'"'ing the embedded software code and the unique identification code.

6. In the method of claim 1, step (c) further comprises transferring the password via a wireless communication link.

7. In the method of claim 1, step (c) further comprises transferring the password via a wireline communication link.

8. In the method of claim 1, the storage of the password of step (f) further comprises storing the password in a table, wherein the table comprises a list of previous passwords.

9. In a base station that includes a plurality of embedded software programs and an embedded unique identification code, a method for using public key cryptography to verify a password is from a valid source, wherein the password enables at least one embedded software program of the plurality of embedded software programs, the method comprises the steps of:

a) upon a predetermined condition, decrypting, via a public key, the password to produce a unique identification code and an embedded software code;

b) comparing, the unique identification code with the embedded unique identification code; and

c) when the unique identification code and the embedded unique identification code substantially match, indicating that the password is genuine and the embedded software code is authorized.

10. The method of claim 9 further comprises the step of, when the unique identification code and the embedded unique identification code do not substantially match, indicating that the password is not genuine and the embedded software code is unauthorized.

11. A method for generating a password by using public key cryptography, wherein the public key cryptography comprises a private key, the method comprises the steps of:

a) obtaining an embedded unique identification code and an embedded software code; and

b) encrypting the unique identification code and the embedded software code, via the private key, to produce the password.

12. The method of claim 11 further comprises, prior to the encryption of step (b), combining the embedded software code and the embedded unique identification code.

13. In the method of claim 12, the combination of the embedded software code and the unique identification code further comprises concatenating the embedded software code and the unique identification code.

14. In the method of claim 12, the combination of the embedded software code and the unique identification code further comprises exclusive OR'"'"'ing the embedded software code and the unique identification code.

15. In a communication unit that includes a plurality of embedded software programs and an embedded unique identification code, a method for using public key cryptography to verify a password is from a valid source, wherein the password enables at least one embedded software program of the plurality of embedded software programs, the method comprises the steps of:

a) upon a predetermined condition, decrypting, via a public key, the password to produce a unique identification code and an embedded software code;

b) comparing, the unique identification code with the embedded unique identification code; and

c) when the unique identification code and the embedded unique identification code substantially match, indicating that the password is genuine and the embedded software code is authorized.

16. The method of claim 15 further comprises the step of, when the unique identification code and the embedded unique identification code do not substantially match, indicating that the password is not genuine and the embedded software code is unauthorized.