Question: What type of club was the Hasty Pudding Club, founded by Charles Macomb Flandrau?
Sentence (from "Hasty Pudding cipher"): The Hasty Pudding Cipher (HPC) is a variable-block-size block cipher designed by Richard Schroeppel, which was an unsuccessful candidate in the competition for selecting the U.S. Advanced Encryption Standard (AES).
Relevant evidence: No