public key cryptography & RSA Algorithm
DES was one of the first widely used algorithms however it has been cracked and is no longer considered secure. AES has not been cracked and is used by the US government while IDEA is favored by European nations.
RC stands for “Ron’s Code” and is a family of algorithms written by Ron Rivest in 1987. Blowfish is a strong open-source symmetric algorithm created in 1993.
Advantages:
=> There are some very fast classical encryption (and decryption) algorithms.
=> Since the speed of a method varies with the length of the key, faster algorithms allow one to use longer key values.
=> Larger key values make it harder to guess the key value and break the code by brute force attack(One of the hacking mechanisms).
Disadvantages:
=> Requires secure transmission of key value.
=> Requires a separate key for each group of people that wishes to exchange encrypted messages (readable by any group member).
=> For example, to have a separate key for each pair of people, 100 people would need 4950 different key.
Back