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Retrive PasswordEnter right registered email to receive password! Enter your emailid(Username) (*)Please enter registered emailid! Symmetric Encryption This encryption method makes use of same “secret key” to encipher and decipher the message and it is termed as private key encryption. This type of encryption methods uses mathematical operations so it is efficient needs only minimal processing. Both sender and receiver should possess encryption key. If any copy of key is compromised, an intermediate can decrypt and the read messages which was being sent. The several methods of symmetric encryption techniques are as follows: •Data Encryption Standard (DES) – It is one of the popular symmetric
encryption cryptosystems that uses 64-bit block size of plaintext and 56-bit key. This method is adopted by NIST in the year 1976 as federal standard for encrypting non-classified information. Related Discussions:- Symmetric encryption-cryptography
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All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd Why is DES called block cipher?The DES (Data Encryption Standard) algorithm is a symmetric-key block cipher created in the early 1970s by an IBM team and adopted by the National Institute of Standards and Technology (NIST). The algorithm takes the plain text in 64-bit blocks and converts them into ciphertext using 48-bit keys.
What is DES encryption used for?The DES was a data security standard used to encrypt and decrypt non-classified computer data generated by the United States government and any commercial organization. It was a 64-bit encryption algorithm made up of a 56-bit key with 8 bits used to determine parity.
How many rounds does a DES encryption have and what is the relation of the number of rounds to the security strength of the encryption?To encrypt a plaintext message, DES groups it into 64-bit blocks. Each block is enciphered using the secret key into a 64-bit ciphertext by means of permutation and substitution. Several rounds of encryption. The DES process involves encrypting 16 times.
Which algorithm was the first asymmetric or public key encryption algorithm developed in 1977 and published for commercial use?RSA was first publicly described in 1977 by Ron Rivest, Adi Shamir and Leonard Adleman of the Massachusetts Institute of Technology, though the 1973 creation of a public key algorithm by British mathematician Clifford Cocks was kept classified by the U.K.'s GCHQ until 1997.
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Adopted by NIST in 1976 as a federal standard DES uses a 64 bit block size and key
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