Encryption method using random sequence on-demand and having misleading function

Abstract

Aiming at various attacks possibly existing in reality, the invention discloses an encryption method with a misleading function. A pseudo key can be easily obtained after using the encryption method, thus, a cryptanalyst can be misled, the misleading is dependent on an inlayer key, for performing any misleading, a sub-key is generated by long random sequences, and the long random sequences can be generated by quantum key distribution. For saving keys, the shortest key length is intercepted as needed, in decryption, corresponding information is obtained, and the key length intercepted in encryption also can be determined so as to keep synchronous. A keyword database is needed for encryption, keyword expansion for inlayer encryption of the encryption process is executed based on the database, and the outer layer encryption uses a conventional encryption method. The method has certain use value in the encryption in various occasions, particularly in the aspect of military affairs.

Description

technical field [0001] The invention belongs to the field of information security and relates to an encryption method, in particular to an encryption method with a misleading function, which uses a random sequence as a key to determine plaintext in an economical manner. Background technique [0002] The ciphertext obtained by most existing cryptographic algorithms has a very small probability of being decrypted with a wrong key to obtain meaningful plaintext. This kind of wrong key that can obtain meaningful plaintext is called a false key. As the ciphertext increases, the number of pseudo-keys will gradually decrease. The pseudo-keys will be reduced to only one key at the end, which will threaten the security of the cryptographic system. The unique solution distance is when the ciphertext is tried with different keys, and only the length of a meaningful plaintext can be obtained. In fact, the estimation formula of the unique solution distance does not consider that the rea...

AI Technical Summary

Problems solved by technology

(4) You can take the initiative to mislead the other party, the wrong key can get meaningful plaintext to mislead the other party, and use the false key to get various similar and opposite "plaintexts", which have a certain "offsetting" effect compared with the original plaintext, Confused cryptanalysts

Some algorithms decide to mislead keywords using pseudo-random sequences generated by algorithms such as stream ciphers and block ciphers. Since the keys used are short and not truly random, it is impossible to let the plaintext obtained by decrypting the ciphertext with the wrong key traverse all Misleading clear text, making it impossible to mislead at will and has limitations

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