Algorithm Modes & Algorithm Types in Network Security – ECB | CBC | CFC | OFB | CTR
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In this network security video tutorial we will study and understand the different types of algorithms and the different modes in which these algorithms work.
An algorithm type is basically how the algorithm operates on the plain text to get the cipher text. It can be classified into 2 categories -
1. Stream Ciphers - Stream cipher techniques involves the encryption of plain text one bit at a time and decryption also happens one bit at a time.
2. Block Ciphers - Block cipher techniques involves the encryption of plain text one block(64 bit or some fixed size) at a time and decryption also happens one block at a time.
Algorithm modes -
An Algorithm mode is a combination of a series of the basic algorithm steps on block cipher and some kind of feedback from the previous step.
In general there are 5 different types of algorithm modes in NS-
1. Electronic Code Book (ECB)
2. Cipher Block Chaining (CBC)
3. Cipher Feedback (CFC)
4. Output Feedback (OFB)
5. Counter Mode (CTR)
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2018-08-09 13:30:01
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