Klocwork
Enterprise-Scale Static Analysis for Security, Safety, and Quality Compliance.

The global gold standard for breach detection and credential exposure intelligence.
Have I Been Pwned (HIBP) is a foundational cybersecurity platform engineered by Troy Hunt, serving as the world's most comprehensive repository of historical and real-time data breaches. In 2026, it remains the critical infrastructure layer for credential stuffing prevention and identity verification services globally. Technically, HIBP utilizes a sophisticated k-Anonymity model for password verification, ensuring that full password hashes are never transmitted over the wire, thus maintaining user privacy while allowing for precise matching against over 800 million compromised credentials. The platform's architecture is built on Azure, leveraging globally distributed caches to provide sub-second latency for API requests. For enterprises, HIBP provides a high-throughput API v3 and domain-wide monitoring, allowing security teams to automatically detect and remediate employee credential exposures before they can be weaponized in Account Takeover (ATO) attacks. Its market position is solidified through strategic partnerships with password managers like 1Password and Bitwarden, as well as integration into major web browsers, making it an indispensable tool for modern DevSecOps and incident response workflows.
Allows checking if a password hash exists in the database by sending only the first 5 characters of the SHA-1 hash, preventing HIBP from ever seeing the full hash.
Enterprise-Scale Static Analysis for Security, Safety, and Quality Compliance.
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Graph-based threat modeling and attack surface visualization directly within the DevSecOps lifecycle.
Immutable video provenance through blockchain-anchored hash-on-capture technology.
Verified feedback from the global deployment network.
Post queries, share implementation strategies, and help other users.
Automated domain ownership validation via DNS, meta tags, or file upload to allow monitoring of entire corporate ecosystems.
Push notifications sent to a specified endpoint whenever a monitored email or domain appears in a new breach.
Continuous scraping of public 'pastes' to identify leaks before they are structured into formal databases.
Detailed breakdowns of each breach, including the source, specific data points leaked, and verification status.
A downloadable dataset of over 800 million compromised passwords available as SHA-1 or NTLM hashes.
A RESTful interface returning JSON payloads with optimized caching and Cloudflare integration for global performance.
Employees using corporate emails on third-party sites that get breached.
Registry Updated:2/7/2026
Users choosing passwords that have already been compromised.
Identifying the scope of impact after a known vendor breach.