szyfr blokowy

But now we're going to talk about what are called "block ciphers."

So those block ciphers are not considered secure enough for, like, way into the future.

Now, that's a perfect example of a very simple block cipher.

RC2 is a 64-bit block cipher with a variable size key.

For example, p might be the number of bits in a block cipher's key.

And older block ciphers had sometimes, for example, 64 bits was popular.

So 64-bit block ciphers are really no longer considered secure enough for industrial work.

In 2004, a fault attack was published on the block cipher.

RC2 is a 64-bit block cipher with a variable key size and using 18 rounds.

So but in terms of a symmetric block cipher, we've never looked inside one.