$ script/plugin install git://github.com/ababich/authlogic_easy_token.git
Your perishable_tokens become easy - 10-chars strings - manual input and even remember it is not so hard
You should realize security risks using Easy Tokens. Recommended usage: activation via SMS or smth like this that may require manual input.
rev. 1 (c)Alexey Babich, 2009