| 摘要 |
2. In the decryption method of messages with a single-use key, the received message is divided into two parts. Each part is decrypted. The file hash value in the form of a sequence of bits - encrypted with the sender's private key and then with the recipient's public key - is decrypted with the recipient's private key and then, with the public sender's key. The message, encrypted in the symmetric cryptographic system, is decrypted with the key in the form of a sequence of bits of the file hash value. The sequence of bits is obtained by decrypting the previously encrypted sequence of bits, which represents the file hash value. In the case of the message obtained as a result of file decryption in the symmetric cryptographic system, the message hash value is determined in the form of a bit sequence. The hash is compared to the bit sequence, which represents the file hash value generated by the sender. If the hash values of these elements are identical, the message is assumed to be authentic. Characterized in that: The message, encrypted in the symmetric cryptographic system, is decrypted with the key in the form of a sequence of bits of the encrypted file hash value. The sequence is obtained as a result of decrypting the formerly encrypted sequence of bits, which represents the sum of the file hash value and the recipient's identifier, after adding the bit sequence which constitutes the recipient's identifier. |
