create a note on the timeline of snowden revalation
refer to oldest known multiplication table

The multiplication table is dated from 320 B.C

For more information see news.nationalgeographic.com/news/2014/04/140405-chinese-oldest-multiplication-table-decimal/
create a page on exponentiation.html
remove duplication in operation functions
announce inverse operations
create an additive inverse slide
create a page on the multiplicative inverse
create a gcd slide
create a discrete log slide
ask how to use this information
explain how to encrypt a message
decrypt once
decrypt on button click