Lex is going to touch on some of the basic mathematical concepts used in modern (and to some extend ancient) cryptography such as Prime Numbers, Password Entropy Calculation and Probability Theory, with a focus on Modular Arithmetic. With that, he hopes to be able to demonstrate how the Diffie-Hellman key exchange works in practice by making use of a simple example with small integers.
More details: dc44131.org
DEF CON Groups are a gathering point for folks interested in the alternate applications of modern technology, referred to properly as 'hacking'. DCGs are not intended to compete with any other computer groups, such as 2600, but rather to provide yet another gathering place for the discussion of technology and security topics. DCG meetings are open to anyone, regardless of their skill, age, job, gender, etc. DCGs are designed to help you learn new things, meet new people, mentor others in areas you may be strong in, and provide some cohesion within the hacker culture and its members,
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