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Methods and devices for selectively encrypting and decrypting data

A technology of data selection and encryption method, which is applied in the direction of secure communication devices, electrical digital data processing, computer security devices, etc. It can solve the problems of consuming too much system resources and time, and poor data access performance, so as to improve the speed of data encryption and decryption , the effect of sacrificing the strength of protection

Active Publication Date: 2011-04-13
BIGKNOW (BEIJING) DATA TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of the existing encryption technology that consumes a lot of system resources and time in the process of encryption and decryption, and has poor data access performance, the present invention proposes a data selective encryption and decryption method and device, which can realize the protection of the original encrypted data volume. To a comparable extent, the amount of encrypted or decrypted data is reduced, thereby improving the performance of data encryption and decryption

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  • Methods and devices for selectively encrypting and decrypting data
  • Methods and devices for selectively encrypting and decrypting data
  • Methods and devices for selectively encrypting and decrypting data

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Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0033] The embodiment of the present invention collects data multiple times from the generated random seeds, generates and uses plaintext encryption bits to identify random strings, and randomly selects more than half of the data from the plaintext to encrypt; The plaintext encryption bit corresponding to the plaintext identifies the random string, and decrypts the encrypted data in the ciphertext.

[0034] The embodiment of the present invention is implemented in this way, a data selection encryption method, the method includes:

[0035] Generate and store a string of true random numbers...

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Abstract

The invention belongs to the technical field of data encryption and decryption and in particular relates to methods and devices for selectively encrypting and decrypting data. The method for encrypting data comprises the following steps: generating true random numbers 0 and 1 strings with predetermined length as random seeds according to the preset method; acquiring data from the random seeds multiple times and cascading the acquired data every time into a random string with length not less than plaintext length; generating a plaintext encryption bit identifying random string according to the random string; selecting more than half plaintext data to be encrypted according to the plaintext encryption bit identifying random string; and arranging the encrypted data and the unencrypted data according to the plaintext position to form ciphertext. The device for encrypting data comprises a true random number generating module, an encryption bit identifying random string generating module, a plaintext data selecting and encrypting module and a ciphertext forming module. The invention also provides the method and device for selectively decrypting data. The method and device in the invention reduce the quantity of the encrypted or decrypted data, thus improving the performances of data encryption and decryption.

Description

technical field [0001] The invention belongs to the technical field of data encryption and decryption, and particularly relates to a method and device for selective encryption and decryption of data. Background technique [0002] Encrypting data has proven to be an effective method of data protection. The traditional data encryption method is to encrypt all data one or more times with a certain encryption algorithm. Because the data encryption and decryption process consumes a lot of system resources and time, it is difficult to obtain good data access while the data is protected. performance. SUMMARY OF THE INVENTION [0003] In order to solve the problems that the existing encryption technology consumes a lot of system resources and time in the encryption and decryption process, and the data access performance is poor, the present invention proposes a data selective encryption and decryption method and device, which can realize the protection between the obtained and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/24
CPCH04L9/0662
Inventor 刘慧
Owner BIGKNOW (BEIJING) DATA TECH CO LTD
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