Question

What is the differene between double des triple des?

Answer 1

Data Encryption Standard, or DES, is a block cipher where a string of bits are transformed into an encrypted string of bits of equal length using a key of a specific size. It is a symmetric-key cipher, so anyone with the key can decrypt the text.

Hardware was created to support DES as well as software, but as computing machines got more powerful, DES encryption fell to brute force attacks on the key space.

Rather than make an all new encryption standard (which eventually happened in 2001 with the Advanced Encryption Standard) or trying to build hardware with a larger key size, the core DES hardware and algorithms were expanded into the Triple DES or 3DES standard, which used the same DES algorithm but ran it on data blocks three times with three different keys, running an encrypt with key 1, a decrypt with key 2 and another encrypt with key 3. Functionally, there three keys were implemented as a single key 3 times as long as the regular DES key. By implementing the enciphering as an encrypt-decrypt-encrypt cycle with three different keys, this same hardware could also be backward compatible with DES when all 3 keys were set to the same key. The longer key and multiple encryption steps made the resulting ciphertext much harder to crack with brute force methods.

mark as brainliest

Answer 2

Answer:

Answer:single touch we use only <strong>one pole of one magnet and rub it across the surface of the substance in only one direction. ... We never slide both the magnets in the same direction in double touch method. Both magnets are slid in two different directions.