Cryptography study hub — 2-day exam prep
Today + tomorrow. Path: Crypto Landscape → Intro Playlist Concepts → DES Feistel Round → DES Key Schedule → RC4 Keystream → RSA Modular Math → Diffie-Hellman & RSA → SHA-1 Padding → SHA-1 Compression
Study plan progress: —
Day 1: DES + RC4. Day 2: DH, RSA, SHA-1 + timed exam. Interactive checkboxes.
One-page formulas and canonical exam numbers. Print-friendly.
Symmetric vs asymmetric, cipher vs hash, where each algorithm fits.
CIA, security layers, threats, Sec-SDLC — from professor's 9 intro videos.
f-function, S-box lookup, worked round-1 example.
PC-1, left shifts, PC-2 — worked K₁ and K₂.
KSA + PRGA. 3-bit and 4-bit worked solutions.
Extended Euclidean (d=59) + successive squaring (C=98).
Key agreement, modular exponentiation, encrypt/decrypt concepts.
512-bit block layout, padding arithmetic, visual bit diagram.
W expansion, 80-round overview, professor doc format.
Row/column rule with diagram. Use during DES drills.
Canonical terms — print-friendly HTML.
Extended Euclidean template + successive squaring for M=21→C=98.
Original lecture notes — 3-bit and 4-bit solutions complete.