#153: Cryptography explain

[Randall Munroe (drawn as Cueball) stands behind a lectern on a podium in front of a large conference audience (consisting of Cueball heads), with a poster hanging beside him.]

Randall: My cryptosystem is like any Feistel cipher, except in the S-Boxes we simply take the bitstring down, flip it, and reverse it.

[The poster reads:]

Decryption

01101010

00110101

[inverter symbol]

11001010

[crossed arrows]

01010011

[Caption below the crowd:]

I’ve been barred from speaking at any major cryptography conferences ever since it became clear that all my algorithms were just thinly disguised Missy Elliott songs.