Data encryption and decryption method and apparatus thereof, and communication system

A data encryption and encryption algorithm technology, which is applied in the field of communication systems, can solve the problems of increasing the difficulty of data decryption and the need to improve the security, and achieve the effects of increasing the difficulty of cracking, expanding the selection range, and improving security

Inactive Publication Date: 2016-07-13
SPREADTRUM COMM SHENZHEN CO LTD
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Problems solved by technology

[0003] With the evolution of the encryption algorithm, the group encryption algorithm encrypts the data in groups, which increases the difficulty of data decryption. However, a fixed encryption algorithm and key are used for encryption. After the encryption algorithm and key are determined, the plaintext and the password form a corresponding relationship. , can be cracked by brute force methods such as brute force method, and the security needs to be improved

Method used

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  • Data encryption and decryption method and apparatus thereof, and communication system
  • Data encryption and decryption method and apparatus thereof, and communication system
  • Data encryption and decryption method and apparatus thereof, and communication system

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Embodiment Construction

[0071] As mentioned above, a fixed encryption algorithm and key are used for encryption. After the encryption algorithm and key are determined, the plaintext and the password form a corresponding relationship, which can be cracked by brute force methods such as exhaustive methods, and the security needs to be improved.

[0072] In response to this problem, the embodiment of the present invention generates segmented data by segmenting the data to be encrypted, randomly selects an encryption algorithm for the data to be encrypted, and randomly generates a key corresponding to the encryption algorithm, so that the encryption key used to encrypt the The encryption algorithm and key of the data to be encrypted have randomness, thereby increasing the difficulty of deciphering and improving the security of the data encryption method.

[0073] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present in...

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Abstract

A data encryption and decryption method and an apparatus thereof, and a communication system are disclosed. The data encryption method comprises the following steps of segmenting data to be encrypted and generating a segmented data; aiming at the data to be encrypted, randomly selecting an encryption algorithm; randomly generating a secret key corresponding to the encryption algorithm; using the encryption algorithm and the secret key to encrypt the data to be encrypted so as to acquire the encrypted segmented data; packing the encrypted segmented data to acquire an encrypted segmented data block; and combining and packing the encrypted segmented data block to acquire a final cryptograph. By using the encryption method, cracking difficulty is increased and safety of the data encryption method is increased.

Description

technical field [0001] The present invention relates to a communication system, in particular to a data encryption and decryption method, device and communication system. Background technique [0002] Data encryption, also known as cryptography, refers to the conversion of plaintext into ciphertext through encryption algorithms and encryption keys, and decryption is the reverse of restoring ciphertext to original text through decryption algorithms and decryption keys. Data encryption uses cryptographic technology to encrypt information to realize information concealment and protect information security. [0003] With the evolution of the encryption algorithm, the group encryption algorithm encrypts the data in groups, which increases the difficulty of data decryption. However, a fixed encryption algorithm and key are used for encryption. After the encryption algorithm and key are determined, the plaintext and the password form a corresponding relationship. , can be cracked ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06
Inventor 李钰王芳
Owner SPREADTRUM COMM SHENZHEN CO LTD
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