Extension fields part I Motivation Extension fields is the mathematics involved in two example cases: When you burn data on a disk. The data can then be retrieved when read even when there are scratches on the disc. Even if there are errors on the disc when read due to the scratches, some algorithm called … Continue reading Algebra cheatsheet III

# Category: cryptography

FINITE FIELDS / GALOIS FIELDS Motivation The Advanced Encryption Standard (AES) / Rijndael algorithm is the most widely used symmetric/private/secret key cryptographic protocol. The only feasible way of breaking it up to date is by a brute force attack. This does not include implementation flaws by the implementor and side channel attacks due to physical … Continue reading Algebra cheatsheet II

This algebra reference is important for cryptography and error control coding. 1. NUMBER SETS - Natural numbers {1,2,3,...}- Does not include infinity as it is not a valid number. Prime numbers- A subset of natural numbers that has no lower order factors except 1. See link - Integers {... , -3, -2, -1, 0, 1, … Continue reading Algebra cheatsheet I