Comes with everything you need to understand complete
systems such as SSL/TLS: block ciphers, stream ciphers,
hash functions, message authentication codes, public key
encryption, key agreement protocols, and signature
Learn by doing.
Learn how to exploit common cryptographic flaws, armed
with nothing but a little time and your favorite
Forge administrator cookies, recover passwords, and even
backdoor your own random number generator.
DRM-free and available in all common formats:
PDF (for Mac and PC)
EPUB (for most ebook readers, iPad and iPhone)
Mobi (for Kindle)
Exercises run on OS X, Windows, Linux and BSDs.
Crypto 101 is available for everyone, for free,
forever. Development is
Github, funded by free time and your
donations. You are free to donate any amount you want,
and all donations are of course entirely
voluntary. The easiest way to donate is through
The following donation methods are also available:
is a world-leading cloud services provider. They
have incredibly generously offered to take care of
all of Crypto 101's hosting requirements free of
charge. This project simply wouldn't be possible
without their help.
Crypto 101: the presentation
Crypto 101 started as a presentation at PyCon 2013. It
tries to go through all of the major dramatis personae of
cryptography to make TLS work in 45 minutes. This book is
the natural extension of that, with an extensive focus on