What is cryptography?
Cryptography is the practice and study of hiding information. In modern times cryptography is considered a branch of both mathematics and computer science and is affiliated closely with information theory, computer security and engineering. – from Wikipedia.
Strong crypto Vs. Weak crypto
Algorithms which are difficult to decipher are termed as “Strong crpto” and those that are easy to decipher are called “Weak crypto”.
Most commonly known ciphers from olden days
* Concealment ciphers
* Substitution ciphers
* Transposition ciphers
Cryptanalysis is the art or technique used in breaking the ciphers. This is used at various levels of nations interest and at educational level.
Uses of Cryptography in everyday life
* Network logging
* Encrypting email messages with company data
* Web based transactions
* Transferring files through medias