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Method and apparatus for synchronously renewing cipher

A technology of synchronous update and password, which is applied in the direction of synchronous sending/receiving encryption equipment, etc., and can solve problems such as unable to update passwords synchronously

Inactive Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for synchronously updating passwords, a terminal and a server to solve the current problem that if the server side and the terminal side are not synchronized, the password cannot be updated synchronously

Method used

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  • Method and apparatus for synchronously renewing cipher
  • Method and apparatus for synchronously renewing cipher
  • Method and apparatus for synchronously renewing cipher

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0050] Example 1: Create two passwords and a predefined sequence, insert the predefined sequence before encryption and do not make redundant judgments.

[0051]S101. Create a password and a predefined sequence on the server side.

[0052] The server side creates two passwords and a predefined sequence, and saves them in the storage module in the server.

[0053] S102. The server sends the password and the predefined sequence to the terminal.

[0054] After receiving the password and the predefined sequence, the terminal side stores them in the storage module in the terminal.

[0055] S103. The server side notifies the terminal side to update the password synchronously through the predefined sequence inserted in the last frame before updating the password.

[0056] According to the security regulations, the server side prepares to update the password (that is, prepares to use the currently unused password among the two passwords created), then before the last frame of user da...

example 2

[0065] Example 2: Create two passwords and a predefined sequence, insert the predefined sequence after encryption and perform redundancy judgment.

[0066] S201. The server side creates a password and a predefined sequence. (same as step S101 in example one)

[0067] S202. The server sends the password and the predefined sequence to the terminal. (same as step S102 in the example one)

[0068] S203. The server side notifies the terminal side to update the password synchronously through the predefined sequence inserted in the last frame before updating the password.

[0069] After the server encrypts each frame of user data, it judges whether the predefined sequence stored in the storage module is the same as the segment in the current frame of user data through the judgment module, and if there is the same situation, then pass The redundant symbol adding module inserts redundant symbols into the segment to distinguish the segment from the predefined sequence, so that the te...

example 3

[0078] Example 3: Create multiple passwords and corresponding multiple predefined sequences, insert the predefined sequences after encryption and perform redundancy judgment.

[0079] S301. The server side creates a password and a predefined sequence.

[0080] The server side creates multiple passwords, and correspondingly creates a predefined sequence equivalent to the number of passwords. The created password and the predefined sequence are stored in a storage module in the server, and a corresponding relationship between the two is established.

[0081] S302. The server sends the password and the predefined sequence to the terminal.

[0082] After receiving the password and the predefined sequence, the terminal side stores them in the storage module in the terminal, and establishes the same corresponding relationship as that on the server side.

[0083] S303. The server side notifies the terminal side to update the password synchronously through the predefined sequence in...

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Abstract

This invention discloses a method, a terminal and a server for synchronously refreshing codes for solving the problem that if the server side is not synchronous with the terminal, it's impossible to refresh codes synchronously, in which, the method includes: A, the server side plugs in a pre-defined sequence in the last frame user data before refreshing codes and sends it to the terminal, B, the terminal side identifies said pre-defined sequence and uses related codes to decipher the latter user data frames.

Description

technical field [0001] The invention relates to the field of encryption and decryption, in particular to a method for synchronously updating passwords, a terminal and a server. Background technique [0002] In broadcasting services, in order to avoid eavesdropping by unauthorized users, it is necessary to encrypt the data in the channel and only send the password to authorized users. In order to ensure security, the password must be updated regularly, which can effectively prevent unauthorized users from cracking the password through "brute force" (for example: brute force method). Authorized users will receive updated passwords, so they will not be affected by password changes. [0003] Currently, new passwords are sent to authorized users in advance, along with notification of when the new passwords will start to be used (for example: time or frame number). When the notified time arrives, all authorized users will use the new password to decrypt and can normally obtain u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/12
Inventor 马勇
Owner HUAWEI TECH CO LTD