encid

Encid is a Go program and library designed to securely encode and decode integer IDs, preventing attackers from guessing, enumerating, or inferring relationships between resources. It is particularly useful for web services that expose database IDs in URLs, as it transforms sequential integers into non-guessable, encrypted strings without revealing actual values or order.

Key Features

• Encrypted ID Generation — Converts consecutive integer IDs into random-looking, encrypted strings using cipher keys.
• Type-Based Key Management — Supports multiple cipher key types (e.g., for users, documents) for flexible resource segregation.
• Base Encoding Options — Offers base30 (default) and base50 encodings for compact, URL-safe output.
• Command-Line Interface — Provides encid CLI for encoding, decoding, and key management operations.
• Keystore Persistence — Stores cipher keys in a configurable keystore file, with automatic key creation when needed.

Philosophy

Encid focuses on simplicity and security, providing a lightweight solution to a common web vulnerability by ensuring that exposed IDs reveal no information about the underlying data or system scale.