Hybrid encryption method and device for realizing the same

Abstract

The invention discloses a hybrid encryption method, which belongs to the information security technology field. The hybrid encryption method utilizes an AES symmetric encryption algorithm to encrypt the message data and utilizes SM2 encryption algorithm to encrypt the session key. The invention also discloses a device for realizing the above hybrid encryption method by using hardware. The method combines the advantages of the AES algorithm and the SM2 algorithm, wherein the AES algorithm has advantages of fast arithmetic speed, low requirement for memory, reliable algorithm and can effectively resist the attack of differential cryptanalysis and linear cryptanalysis, and the SM2 algorithm can provide public key ciphers with most significant bit and obtain a ciphertext with a high security level by using a short secret key, according to the above advantages, the method can effectively resolve the contradiction between the big data encryption efficiency and the algorithm security.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a hybrid encryption method and a device for realizing the method. Background technique [0002] Data encryption technology is the most commonly used and most important technology to ensure network information security. Key-based encryption algorithms in encryption technology can be divided into two categories: symmetric encryption technology and asymmetric encryption technology. The symmetric encryption algorithm uses exactly the same key to encrypt and decrypt data, which is highly efficient, and its advantages are more obvious for large-block data processing. However, its security depends on the strength of the encryption algorithm and the protection of the key. The symmetric encryption algorithm has key management problems and key distribution cannot be performed. Asymmetric encryption algorithm, which has strong security, and can distribute and manage keys, but...

AI Technical Summary

Problems solved by technology

However, its security depends on the strength of the encryption algorithm and the protection of the key. The symmetric encryption algorithm has key management problems and key distribution cannot be performed.

Asymmetric encryption algorithm, which has strong security and can distribute and manage keys. However, the algorithm is complex and the data processing speed is slow. It is suitable for encrypting small blocks of data.

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