**Introduction**

Cryptographic
algorithm works on main two techniques: block and stream ciphers.

In a
stream cipher, the plaintext is encrypted one bit at a time. In a block cipher,
the plaintext is broken into blocks of a fixed length and the bits in each
block are encrypted together. One of the main issues with block ciphers is that
they only allow you to encrypt messages the fixed size as their block length.

If
plaintext, which has a block size 64 bits easily encrypt. But encrypt a 65-bit
message, you need a way to define how the second block should be encrypted.

The
solution to this is called block cipher modes of operation. Need of block
cipher mode is basic building block for providing data security. In block
cipher rather than encrypting one bit at a time, block of bits is encrypted at
a time.

There are 5 modes of operation for block cipher that may be used in a wide variety of applications like symmetric key cryptographic algorithm. These modes define how data encrypted and decrypted.

Figure: Different Modes of Block Cipher |

**Application/Real time usage of
block cipher modes operations**

**To learn more about Triple DES, Click here**

**Watch more videos click here.**

## No comments:

## Post a Comment