Password checking and making

• https://netid.cornell.edu/psc/lookup.html

Also:

• http://xkcd.com/936/
• https://www.grc.com/haystack.htm
• http://en.wikipedia.org/wiki/Password_strength

Password rules

http://www.it.cornell.edu/services/netid/faq.cfm#complex

Cornell NetID

• Why do I have to choose a complex password for my NetID? (link to CIT's FAQ)
• http://www.it.cornell.edu/security/identity/passwords/strong.cfm

Cornell CAC (MS AD's default)

• https://www.cac.cornell.edu/wiki/index.php?title=Rules_for_Creating_Passwords

Password recovery (also known as "breaking")

• http://www.elcomsoft.com/