2. Bellare-Rogaway Plaintext-aware Encryption (OASP)

The structures of OSEP is

OSEP_diagram

Plaintext \(\xrightarrow{OAEP}\) Domain of OWTP \(\xrightarrow{OWTP}\) ciphertext.

Another way to visualize OAEP

OSEP_diagram2

OAEP is a 2-round Festel Cipher