For some time it has been common practice to protect and tansport a key for DES encryption with triple-DES (3DES). The function follows an encrypt-decrypt-encrypt (EDE) sequence.
Decrypt sequence is simply the same (encrypt) operation with the keys reversed.
3 DES of (Triple Data Encryption Standard)
fot the past 25 years single des algorithm was used. But now triple des is used in atm cards for the encryption and decryption.
Encryption
People have developed many encryption algorithms. One particular encryption algorithm is the Rijndael algorithm, usually called the AES or Advanced Encryption Standard.
In 3DES, 3 distinct keys are used as K1, K2 and K3. First encrypt with K1, then Decrypt with K2 and finally Encrypt with K3 so actual key length used in 3DES is 168 excludin 8 bit party from each 64 bits means (56+56+56 becomes 168).
Encryption is converting plain text into cipher text . Yes, encryption can be cracked and then the text can be decrypted.
"Evaluating cryptography is difficult since without 'breaking' the encryption its hard to say whether one encryption is better or not. Pretty Good Encryption (PGP) is asymmetric, that is the encryption and decryption keys are different which may give it an edge on symmetric encryption."
Basic encryption (up to 256 bit encryption) software costs around $400 per year. Encryption softwares are not 100% foolproof.
Encryption
what does the word skit stand for in encryption
Mostly for performance - symmetric encryption is much much faster (order of magnitudes) than asymmetric encryption.
Mostly for performance - symmetric encryption is much much faster (order of magnitudes) than asymmetric encryption.