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In 3DES, the encryption-decryption process involves the following steps. For decryption, the encryption process is executed in reverse. DES is a block cipher, and encrypts data in blocks of size of 64 bit each, means 64 bits of plain text goes as the input to DES, which produces 64 bits of cipher text. Decryption uses the same steps and the same key, the only difference is that the key order is opposite to the encryption process. Various minor cryptanalytic properties are known, and three theoretical attacks are possible which, while having a theoretical complexity less than a brute-force attack, require an unrealistic number of known or chosen plaintexts to carry out, and are not a concern in practice. The encryption procedure in 3DES is the same as that of the regular DES with the exception that the algorithm is repeated thrice, and due to this, its name is 3DES. DES encryption: The input of the algorithm includes […] The same algorithm and key are used for encryption and decryption, with minor differences. Although more information has been published on the cryptanalysis of DES than any other block cipher, the most practical attack to date is still a brute-force approach. DES (Data Encryption Standard) uses 64-bit grouping length and 56-bit key length. The … It converts 64-bit input into 64-bit output through a series of transformations. Triple Des Algorithm Steps.

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