Data transmission method for grid mobile terminal based on improved DES encryption algorithm

Abstract

The invention relates to a data transmission method for a grid mobile terminal based on an improved DES encryption algorithm, comprising: inputting an entry parameter of a DES encryption algorithm, translating and dividing the significant digits of the key Key into two parts, creating 16 sub-keys K[j][48] having a length of 48 bits, dividing the 64-bit plaintext data into 16 copies every four bits, encrypting the order of the sub-keys after the location exchange, encrypting the plaintext data, performing S-box operation to obtain the DES encryption result of the transmission, and decrypting the information transmitted. At the same time, a right control module, an anti-theft mode and positioning service module, and a smart dialing module are added on the mobile terminal side. The inventionmakes the attacker cannot obtain the transformation situation through a large amount of plaintext, reduces the complexity and cumbersomeness of the algorithm, and makes the operation efficiency of thealgorithm basically not affected, makes the complex degree of the exhaustive attack also become more cumbersome since the sub keys change corresponding to the order of the transformation, and greatlyimproves the security of data protection.

Description

technical field [0001] The invention relates to the technical field of mobile terminal monitoring power grid operation and power grid scheduling data platform, in particular to a power grid mobile terminal data transmission method based on an improved DES (symmetric key) encryption algorithm. Background technique [0002] With the development of smart grid construction, the application of mobile terminals in the monitoring of grid operation environment is becoming more and more extensive. In view of the current construction status of the information system of the control center, it is necessary to improve the technical solution of the mobile control comprehensive data platform based on the security information encryption technology. The integrated data platform for mobile regulation is divided into two parts: the server and the mobile client. Since the mobile terminal needs to receive and store a large amount of sensitive information on power grid operation, if such informat...

AI Technical Summary

Problems solved by technology

(3) S-box is the core of DES algorithm, vulnerable to differential cryptanalysis

(2) N-fold DES algorithm, the improved algorithm increases the encryption strength of the algorithm, but obviously increases the complexity of the algorithm and reduces the efficiency of the algorithm

(3) Changing the order of S-boxes can weaken linear attacks and plaintext attacks, but differential cryptanalysis still threatens the security of DES algorithm

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