I'm having fun reading and playing with 'Codebreaking, a practical guide' by Elonka Dunin & Klaus Schmeh. https://www.codebreaking-guide.com/ https://www.codeb

I'm having fun reading and playing with 'Codebreaking, a practical guide' by Elonka Dunin & Klaus Schmeh. https://www.codebreaking-guide.com/ https://www.codebreaking-guide.com/