A simple and direct 35 minute presentation about basic cryptography by Brenno de Winter ( http://ictroddels.nl ) in 2005.

In this presentation, Brenno will show you the basics of cryptography and how to do it without the use of a computer and how you can do it without difficulty with just pen and paper.

Take the example of ROT-13

And if you are asking yourself why do you need it, here are a few basic reasons:

If you think you have got nothing to hide...

- It is a civil liberty and human right
Needed for:

- Fundamental basis for maintaining democracy
- Providing protection from totalitarian regimes
- Needed to maintain freedom of speech
- Personal life
- Protection against crimes
- Protection against data theft
- ... and more...

Download here + MD5 (314MB)