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Method, system and device for grouping encryption

A group encryption and group data technology, which is applied in the field of information security, can solve problems such as increasing the risk of data being cracked, and achieve the effect of reducing the risk of data being cracked

Inactive Publication Date: 2012-07-04
李智虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when using the block cipher working mode to encrypt and decrypt short plaintext, such as encrypting and decrypting 1 bit or several bits of data, or using the block cipher working mode to encrypt and decrypt data with a high probability of being the same as the plaintext, such as weather conditions, certain If the geological conditions of a region, employee salaries of a certain unit, bank card passwords, etc. are still filled with fixed methods, it will undoubtedly make it possible to guess the plaintext and increase the risk of data being cracked

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  • Method, system and device for grouping encryption

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] The embodiment of the present invention provides a packet encryption method, the method includes such as figure 1 The steps described:

[0035] Step 101: padding with random numbers at the end of the data to be encrypted;

[0036] Step 102: grouping the data to be filled with tail random numbers;

[0037] Step 103: Encrypt the grouped data.

[0038] It should be noted that when the data to be encrypted cannot be integrally grouped, the tail identifie...

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Abstract

An embodiment of the invention discloses a method, a system and a device for grouping encryption. The method includes: performing random number filling at the tail of data needing encryption; grouping the data performed with tail random number filling; and encrypting the grouped data. In addition, the embodiment of the invention further discloses the system and the device for grouping encryption. Through the technical scheme provided by the embodiment of the method, the system and the device, risks that data are decrypted when the grouped password working mode is adopted to encrypt short plain texts can be effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of information security, and more specifically, to a packet encryption method, system and device. Background technique [0002] In cryptography, the working mode of the block cipher allows the use of the same cipher block cipher to encrypt more than one piece of data and ensure its security. The block cipher itself can only encrypt a single block of data whose length is equal to the length of the cipher block. To encrypt variable-length data, the data must first be divided into a separate cipher block. Generally speaking, the last block of data also needs to use appropriate padding to expand the data to a length that meets the cipher block size. A mode of operation describes the process of encrypting each block of data, often using randomization based on an additional input value, usually called an initialization vector, for security. [0003] The existing block cipher working modes mainly include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 李智虎
Owner 李智虎