Custom Hash IDs
Custom Hash IDs are user-defined or application-specific identifiers generated by applying a hash function to input data, often used to create unique, non-sequential, and obfuscated IDs for resources like database records or URLs. They typically produce short, URL-safe strings that avoid exposing internal details (e.g., auto-incrementing integers) and can encode metadata. This concept is implemented through libraries or custom code in various programming languages to enhance security and usability in web applications and APIs.
Developers should use Custom Hash IDs when they need to generate public-facing identifiers that are secure, non-predictable, and do not reveal sensitive information like database row counts or sequential patterns, such as in RESTful APIs, URL shorteners, or e-commerce systems. They are particularly useful for preventing enumeration attacks, improving user experience with readable IDs, and enabling features like referral codes or tracking tokens without relying on database primary keys.