Cryptography & Secure Communications

Est. read time: 1 minute | Last updated: July 15, 2026 by John Gentile

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Contents

• Fundamentals
  • Hashing
  • Post Quantum Cryptography (PQC)
• Cryptographic Attack/Defense
  • Time Analysis
  • Cryptanalysis
• Application Specific
  • RF Communications Security
    • Spreading Sequences
• Cryptography Software Libraries
• References
  • To Read

Fundamentals

Hashing

• Forcing a file’s CRC to any value: why CRCs shouldn’t be used for cryptographic verification

Post Quantum Cryptography (PQC)

• Lattice Crypto Primer - Cloudflare

Cryptographic Attack/Defense

Time Analysis

• Constant time analysis tooling - Trail of Bits

Cryptanalysis

• Differential cryptanalysis: the study of how differences in information input can affect the resultant difference at the output.
• wycheproof: vectors and tests for crypto libraries against known attacks.

Application Specific

RF Communications Security

• An Overview of Key Technologies in Physical Layer Security
• ASSET Research Group

Spreading Sequences

• A chaotic direct-sequence spread-spectrum communication system - IEEE
• Chaotic sequences for spread spectrum: an alternative to PN-sequences - IEEE
• Chaotic direct sequence spread spectrum for secure underwater acoustic communication - Elsevier

Cryptography Software Libraries

Package	Language	Notes
cryptography	Python	High and low level recipes and interfaces for common cryptographic algorithms
PyCryptodome	Python	Low-level primitives

References

To Read

• Cryptopals Crypto Challenges
  • workspace repo
• Crypto101
• Cryptography 101 with Alfred Menezes
• Cryptohack Challenges
• Useful Cryptography Resources
• Handbook of Applied Cryptography - U Waterloo
• An intensive introduction to Cryptography
• A Graduate Course in Applied Cryptography
• GitHub - sodium-friends/learntocrypto: Learn to crypto workshop
• Elliptic Curve Cryptography Explained – Fang-Pen’s coding note
• 48 Dirty Little Secrets Cryptographers Don’t Want You To Know - YouTube
• veorq/cryptocoding: Guidelines for low-level cryptography software
• GitHub - oconnor663/sha256_project
• AES Encryption Algorithm - Sam Trenholme’s webpage
• The Design of Rijndael AES — The Advanced Encryption Standard
• The Rijndael Block Cipher
• Rolling your own crypto: Everything you need to build AES from scratch (and then never use it for anything of consequence) · francisrstokes/githublog
• Zero-knowledge protocols - ZKDocs

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