*Viginear cypher is more sophisticated than the Caesar cypher. Since the key is several characters long and the length is unknown, the frequency analysis technique becomes more challenging.*

This is the next generation. 128-bit blocks, 128,192, 256 keys. It takes too much time to brute force.

In this article, I’m dissecting a very well-known (and that’s why not advisable to be used) cryptographic algorithm which is better known for IT tribe as “ROT13”.

DES - Symmetric. Data Encryption Standard. NIST 1993. 56 bit key, 64-bit plaintext input (blocks). How secure?

One-time pad is like a Viginear cypher but with the key the length of the cypher text.