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Encrypting method and device

An encryption method and encryption device technology, applied to secure communication devices and key distribution, can solve the problem of insufficient encryption method security, and achieve the effect of improving encryption security

Inactive Publication Date: 2012-03-14
程碧波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is proposed aiming at the problem that the security of the encryption method in the related art is not high enough, for this reason, the main purpose of the present invention is to provide an encryption method and device to solve the above problems

Method used

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  • Encrypting method and device

Examples

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] figure 1 is a flowchart of the encryption method according to the first embodiment of the present invention.

[0024] Such as figure 1 As shown, the method includes the following steps S102 to S104:

[0025] Step S102, obtain the master key stream through the master key.

[0026] Step S104, performing entropy reduction on the master key stream. as well as

[0027] In step S106, the plaintext is encrypted using the entropy-reduced master key stream.

[0028] In this embodiment, by reducing the entropy of the master key stream to form a key stream of an irreversible one-way function value, and then work with the plaintext, for example, the master key stream after entropy reduction en...

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Abstract

The invention discloses an encrypting method and an encrypting device. The encrypting method comprises the following steps of: acquiring a master key stream through a master key; performing entropy reduction on the master key stream; and encrypting a plain text by using the master key stream subjected to the entropy reduction. By the encrypting method and the encrypting device, the encrypting safety can be improved.

Description

technical field [0001] The invention relates to an encryption method and device. Background technique [0002] Encryption has practical security and theoretical security. Practical security resorts to algorithmic complexity, which depends on the computing power and time of the cracker, which is not secure in theory. Theoretical security is independent of the computational power and time of the cracker, and any effort is no better than random selection by chance. Therefore, the truly secure encryption method is the theoretically secure encryption method. If the complexity of the encryption algorithm is not used, as the cracker obtains more ciphertext and plaintext information, the possibility of the key being cracked increases. [0003] Today's encryption methods focus on actual security, and the emphasis is on resorting to algorithmic complexity to encrypt, such as RSA. Other encryption methods attempt to use random keys. Axiomatic information theory holds that in a com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/18
Inventor 程碧波
Owner 程碧波
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