Version 1.0.0 Data breaches happen constantly. When credentials from one breach get reused in credential-stuffing attacks against other services, the ripple effect can last years. That's why checking whether an email address or password has appeared in a known breach is a routine first step in any security assessment. HaveIBeenPwned (HIBP) maintains one of the most comprehensive breach databases available, with over 12 billion compromised accounts indexed. In this tutorial, you'll build a Python CLI tool that checks email addresses and passwords against that database using the HIBP API, with proper k-anonymity implementation to protect privacy.…