| Dates | Sinkov sections | Lewand sections | Class topics/activities |
|---|---|---|---|
| Jan. 6 | 1.1-1.4 | Introduction
Caesar cipher Modular arithmetic Direct standard alphabets "Completing the plain component" | |
| Jan. 7 | 1.5-1.8 | 1.2-1.6 | Characteristic letter frequencies
"Slides" Decimation Solution of decimated standard alphabets Monoalphabets based on linear (affine) transformations Mod operator, mod relation, divisibility, gcd Solving linear congruences Formation of cryptogram-solving teams |
| Jan. 8 | 2.1-2.2, 2.4 | 1.6 | Types of ciphers; glossary
General monoalphabetic substitution Mixed alphabets: ACA schemes Solution of Aristocrats Video: Spies: Code Breaking |
| Jan. 9 | 2.3 | Solution of Patristocrats, monoalphetic substitution without word divisions | |
| Jan. 10 | 3.1-3.3 | 2.5 | Polyalphabetic substitution
Vigenere encipherment/decipherment Kasiski test Friedman's index of coincidence |
| Jan. 13 | Chs. 1-2 | EXAM 1 | |
| Jan. 14-16 | 3.1-3.7 | 2.5 | Solution of polyalphabetic crypts
Video: Decoding Nazi Secrets |
| Jan. 17 | 4.1-4.2 | 3.1 | Polygraphic systems
Playfair cipher Hill's system |
| Jan. 20 | Ch. 3 | 2.5 | EXAM 2 |
| Jan. 21-22 | 4.3-4.6 | 3.2-3.3 | Solution of a linear (affine) transformation |
| Jan. 23 | 1.2 | Euclidean algorithm
Solving a x = b (mod m) | |
| Jan. 24 | 5.1-5.2 | Transposition ciphers
Railfence ciphers Enciphering/deciphering/solving | |
| Jan. 27 | 4.1-5.1 | Ch. 3, 1.2 | EXAM 3 |
| Jan. 28 | 5.3-5.6 | Incomplete columnar transposition ciphers | |
| Jan. 29-30 | 4.1-4.4 | Public key cryptography | |
| Jan. 30-31 | Student presentations |