Fiction Characters in Cryptology

• Alice and Bob. The original, generic characters. Generally, Alice and Bob want to exchange a message or cryptographic key.

• Carol, Carlos or Charlie. A generic third participant.

• Chuck. A third participant, usually of malicious intent.

• Craig. A password cracker, often encountered in situations with stored passwords.

• Dan, Dave or David. A generic fourth participant.

• Erin. A generic fifth participant, but rarely used, as “E” is usually reserved for Eve.

• Eve. An eavesdropper, who is usually a passive attacker. While she can listen in on messages between Alice and Bob, she cannot modify them. In quantum cryptography, Eve may also * represent the environment.

• Faythe. A trusted advisor, courier or intermediary. Faythe is used infrequently, and is associated with Faith and Faithfulness. Faythe may be a repository of key service or courier of shared secrets.[citation needed]

• Frank. A generic sixth participant.

• Grace. A government representative. For example, Grace may try to force Alice or Bob to implement backdoors in their protocols. May also deliberately weaken standards.[citation needed]

• Heidi. A mischievous designer for cryptographic standards, but rarely used.[12]

• Judy. A judge who may be called upon to resolve a potential dispute between participants.

• Mallory or (less commonly) Mallet A malicious attacker. Associated with Trudy, an intruder. Unlike the passive Eve, Mallory/Mallet is an active attacker (often used in man-in-the-middle attacks), who can modify messages, substitute messages, or replay old messages. The difficulty of securing a system against Mallory/Mallet is much greater than against Eve.

• Michael, or Mike. Used as an alternative to the eavesdropper Eve. See Microphone.

• Niaj. Used as an alternative to the eavesdropper Eve in several South Asian nations

• Olivia. An oracle, who provides external data to smart contracts residing on distributed ledger (commonly referred to as blockchain) systems.

• Oscar. An opponent, similar to Mallory, but not necessarily malicious.

• Peggy, or Pat. A prover, who interacts with the system to show that the intended transaction has actually taken place. Peggy is often found in zero-knowledge proofs. Similar to Victor or Vanna.

• Sybil. An pseudonymous attacker, who usually uses a large number of identities. For example, Sybil may attempt to subvert a reputation system. See Sybil attack.

• Trent or Ted. A trusted arbitrator, who acts as a neutral third party.

• Trudy. An intruder.

• Victor, or Vanna. A verifier, similar to Peggy or Pat.

• Walter. A warden, who may guard Alice and Bob.

• Wendy. A whistleblower, who is an insider with privileged access capable of divulging information.

Copy from wikipedia https://en.wikipedia.org/wiki/Alice_and_Bob