## The Euclidean Algorithm

Here: Complexity of Euclidean Algorithm we prove that if $$a,b\in\mathbb{Z},a>b>0$$, then the number of steps in the Euclidean algorithm is…

## Basic definitions

In a previous post (the problem of hiding stuff), we already introduced the meaning of cryptography. Still we miss to…

## The problem of hiding stuff, continued

This post follows up a previous one, and incorporates some comments that have been raised on the Facebook group “Hacker…

## First steps on complexity theory

Talking about cryptography requires another important concept: Computational complexity. Wikipedia gives a very high level definition; the lemma is very…

## The problem of hiding stuff

Definitions Cryptography is defined by Wikipedia as Cryptography or cryptology (from Ancient Greek: κρυπτός, translit. kryptós “hidden, secret”; and γράφειν…

## OpenCrypto

What is OpenCrypto It has been a long time I have been wondering to write down my notes regarding cryptograpy…