35 citations · 159 across the 35 of their papers we have counts for
3 papers · 1 filter
GOTCHA Password Hackers!
Jeremiah Blocki, Manuel Blum, Anupam Datta
We introduce GOTCHAs (Generating panOptic Turing Tests to Tell Computers and Humans Apart) as a way of preventing automated offline dictionary attacks against user selected passwor…
Optimizing Password Composition Policies
Jeremiah Blocki, Saranga Komanduri, Ariel Procaccia +1
A password composition policy restricts the space of allowable passwords to eliminate weak passwords that are vulnerable to statistical guessing attacks. Usability studies have dem…
Naturally Rehearsing Passwords
Jeremiah Blocki, Manuel Blum, Anupam Datta
We introduce quantitative usability and security models to guide the design of password management schemes --- systematic strategies to help users create and remember multiple pass…