Symmetric key random block cipher

• Main Author: SHENGFA GAO
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a symmetric key random block cipher (SKRBC). For overcoming the defect that a key of a traditional block cipher has the close correlation with the ciphertext statistic characteristic, the author studies the basic connotation of a random block cipher, defines and proves the basic property of the random block cipher and designs a band-new block cipher with the characteristics of the random block cipher. Being different from the traditional block cipher, the cipher selects encryption transformation through a simple condition selection logic according to a key value and has the main advantages that the key and the ciphertext statistic characteristic are naturally isolate, the plaintext block length can be extended arbitrarily, the key space is huge, and the encryption speed and the decryption speed are high. The cipher has the advantages that encryption transformation is selected through the simple condition selection logic, and the block length can be arbitrarily extended which are not ac