Charging pile communication system encryption/decryption method

Abstract

The invention discloses a charging pile communication system encryption / decryption method. The method comprises the following steps: base on an asymmetric encryption way for transmitting a key and a symmetric encryption way for transmitting real-time, the symmetric encryption way is used for transmitting real-time data; the asymmetric encryption way uses a public key and private key pair in the encryption and decryption of the information, a server-side issues the public key to the charging pile, wherein the public key is used for encrypting the information, the private key for decryption is saved in the charging pile, the private key is used for decrypting the information encrypted by the public key, and the public key cannot be used for speculating the private key; the asymmetric encryption way transmits the key by use of the improved RSL algorithm. By use of above mentioned technical scheme, the security of system information transmitting is effectively improved, and the technical scheme is good in difference fault attack resistance, safe and reliable, capable of fast decrypting ciphertext, and good in practicability.

Description

Technical field [0001] The invention relates to the technical field of message encryption and decryption of charging piles, in particular to an encryption and decryption method of a charging pile communication system. Background technique [0002] The encryption algorithm is the security guarantee for the fund settlement of the charging pile and is extremely important to guarantee the operation of the charging pile. [0003] Existing charging pile encryption algorithms mostly use the symmetric SM4 encryption algorithm. After the identity is authenticated, the server directly issues the key to the charging pile, which can be easily intercepted and cracked during the communication process. The SM4 encryption algorithm uses a byte-oriented random failure model, combined with the search and analysis attack technology, and only requires 32 incorrect ciphertexts to completely recover the SM4 128-bit seed key. The ability to resist differential failure attacks is weak, with poor security ...

AI Technical Summary

Problems solved by technology

[0003] The existing charging pile encryption algorithm mostly adopts the symmetrical SM4 encryption algorithm. After the identity authentication, the server directly sends the key to the charging pile, and it is easy to be intercepted and cracked during the communication process.

The SM4 encryption algorithm, using a byte-oriented random fault model, combined with the search and score attack technology, only needs 32 wrong ciphertexts to completely recover the 128-bit seed key of SM4. cause economic loss

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