Cryptology
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Methods of proving information is correct or has been transferred
Authentication
Sender authentication
Digital signatures
Key management
- PKI
- PGP
Server authentication
Nonrepudiation
Zero-knowledge proofs
Digital signatures
Confidentiality and integrity
Existence confidentiality
Traffic confidentiality
Message content confidentiality
Atomic and sequential integrity
Methods of concealing information
Cryptography
- Ciphers and codes, including basic methods
- Symmetric, asymmetric, and both
- Key management protocols
- some link to random numbers and other mathematical background
Specific cipher implementations
Mechanical/Electromechanical
- Jefferson/Bazeries cylinder, strip ciphers
- Vernam
- Rotor and rotor-like: Hagelin, Enigma, Purple, SIGABA/Typex
Computer (general purpose and chip) implementations
- General characteristics of military (KG vs KW, etc.)
- Non-text/data: secure voice, video, fax
- DES
- PGP
- AES
Steganography
Hybrid methods
Methods of obtaining partial or full information
- See also: communications intelligence for things including traffic analysis and direction finding
- Man-in-the-middle attack
- Various general scenarios: brute force, chosen plaintext
- Basic mathematical cryptanalysis: frequency analysis, index of coincidence, Kappa test
- Advanced mathematical cryptanalysis
- Red/black engineering and other COMSEC supporting measures
- "Practical cryptanalysis" (black bag job), RINT nethods (TEMPEST/Van Eck, etc.), acoustic cryptanalysis