What are the different modes of block cipher?

There are five types of operations in block cipher modes, ECB (Electronic Code Block) mode, CBC (Cipher Block Chaining) mode, CFB (Cipher Feedback) mode, OFB (Output Feedback) mode and CTR ( Counter) mode.

Which type of encryption does block cipher provide?

A block cipher is an encryption method that applies a deterministic algorithm along with a symmetric key to encrypt a block of text, rather than encrypting one bit at a time as in stream ciphers. For example, a common block cipher, AES, encrypts 128 bit blocks with a key of predetermined length: 128, 192, or 256 bits.

What is the best block cipher mode?

XTS mode is the most common if you are encoding a random accessible data (like a hard disk or RAM). OCB is by far the best mode, as it allows encryption and authentication in a single pass. However there are patents on it in USA.

How are block cipher modes used in cryptography?

Block Cipher Modes (CBC, CTR, GCM.) The main idea behind the block cipher modes (like CBC, CFB, OFB, CTR, EAX, CCM and GCM) is to repeatedly apply a cipher’s single-block encryption / decryption to securely encrypt / decrypt amounts of data larger than a block.

What are the different modes of AES encryption?

General 1 ECB mode: Electronic Code Book mode 2 CBC mode: Cipher Block Chaining mode 3 CFB mode: Cipher FeedBack mode 4 OFB mode: Output FeedBack mode 5 CTR mode: Counter mode

What does CBC stand for in cipher mode?

CBC Mode stands for Cipher block Mode at the sender side; the plain text is divided into blocks. In this mode, IV (Initialization Vector) is used, which can be a random block of text. IV is used to make the ciphertext of each block unique.

What kind of initialization vector do you need for block cipher?

Most modes require a unique binary sequence, often called an initialization vector (IV), for each encryption operation. The IV has to be non-repeating and, for some modes, random as well.