The website "howsecureismypassword.net" is a tool used to check the strength of a password by estimating how long it would take a computer to crack it. It is known to be secure in that it does not store or share the passwords entered. However, the site also advises caution with typing passwords online anywhere because of the inherent risks, and suggests testing passwords by modifying them to ensure security. More broadly, password strength checkers (including this tool and others like NordPass or Kaspersky) use methods that evaluate password length, character variety, and exposure in known breaches to estimate security. They use encryption and secure connections to protect entered data, and do not retain the actual passwords. Thus, the security of howsecureismypassword.net is high in terms of privacy and data handling, but users should always be careful entering sensitive passwords anywhere online. It is best to test passwords using variations or generated samples rather than exact real passwords to be safest.