#039 · Security ProfessionalsEpicLocked in

Nadia Heninger

The Key-Entropy Auditor

Mining Your Ps and Qs, Logjam, and measuring real deployed crypto

Rating

85Impact score
Technical depth95
Defensive craft88
Research96
Influence87
FromUSA
Era2012–present

Domains

CryptanalysisInternet measurementKey generation

Scouting report

Co-authored “Mining Your Ps and Qs”, which scanned the whole IPv4 internet and found that a meaningful share of TLS and SSH keys shared factors because embedded devices generated them without entropy — and then factored them. Followed it with Logjam, DROWN and FREAK, a body of work whose method is: measure what is actually deployed, then break the weak part.

Curator’s note

Proved the crypto was fine and the random number generators were not.

Portrait

Painted from a photograph of Nadia Heninger by Ordercrazy, licensed CC0.

Sources