This category lists some of the users who are participants in the Wikipedia:WikiProject Cryptography.

If you add this userbox to your userpage you get included in this category automatically:

((User WikiProject Cryptography))

This user participates in WikiProject Cryptography.

If you don't want to use the userbox you can instead include this code at the bottom of your userpage:

[[Category:WikiProject Cryptography participants|((PAGENAME))]]