Inside the Massive Naz.API Credential Stuffing List

Troy Hunt analyzes the Naz.API collection — a 104GB dataset of stealer logs and credential-stuffing data containing ~70.8M unique email addresses and nearly 100M unique passwords (observed 1.3B times). He validates the data as legitimate, notes many previously unseen addresses, reports ingestion of the passwords into Pwned Passwords and the emails into Have I Been Pwned, and advises defenders to adopt strong unique passwords and 2FA to mitigate credential-stuffing risk.