Encrypted file transmission method based on combined AES algorithm and ELGamal algorithm

Abstract

The invention discloses an encrypted file transmission method based on the combined AES algorithm and ELGamal algorithm. The AES algorithm based on reversible logic and the asymmetric algorithm ELGamal algorithm are combined, the encryption effect of a file is guaranteed, and the security in the file and the secret key transmission process is guaranteed. The file is encrypted by use of the AES algorithm based on the reversible logic at a sending end, and then an AES secret key is encrypted by use of an ELGamal public key provided by the sending end, and the encrypted file and secret key are sent to a receiving end, the received AES secret key is firstly decrypted by use of the locally saved ELGamal private key at the receiving end, and then the received AES ciphertext is decrypted by use of the reduced secret key to obtain the original text sent by the sending end.

Description

technical field [0001] The method relates to an encrypted file transmission method in the field of information technology, in particular to an encrypted file transmission method combining an AES algorithm and an ElGamal algorithm. Background technique [0002] 1. AES algorithm [0003] Advanced Encryption Standard (English: Advanced Encryption Standard, abbreviation: AES) is a block encryption standard adopted by the US federal government. This standard is used to replace the original DES, has been analyzed by many parties and is widely used all over the world. After a five-year selection process, the Advanced Encryption Standard was published by the National Institute of Standards and Technology (NIST) in FIPS PUB197 on November 26, 2001, and became an effective standard on May 26, 2002. In 2006, Advanced Encryption Standard became one of the most popular algorithms in symmetric key encryption. [0004] The block length of AES is fixed at 128 bits, and the key length can...

AI Technical Summary

Problems solved by technology

[0011] The problem is that traditional logic gates have a fan-out in a certain position, that is, there are two inputs but only one output.

[0015] (2) There is no fan-in and fan-out;

[0016] (3) No feedback;

Most of the file transfers on the market will encrypt and decrypt the transmitted messages according to the corresponding public protocol, but when the user sends the message to the channel, the security of the information is tested, and there is a risk of interception

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