Generates attr_accessors that encrypt and decrypt attributes transparently

The Networking and Cryptography (NaCl) library provides a high-level toolkit for building cryptographic systems and protocols

Modern encryption for Rails

Transparent ActiveRecord encryption

Encrypt ActiveRecord and Mongoid attributes, files and passwords in configuration files.

Strongbox provides Public Key Encryption for ActiveRecord. By using a public key sensitive information can be encrypted and stored automatically. Once stored a password is required to access the information. dependencies are specified in standard Ruby syntax.

Misuse-resistant authenticated symmetric encryption

A library for storing encrypted data in Mongo

Dead-simple string encryption/decryption syntax

This module allows Ruby programs to interface with "RSA Security Inc. PKCS #11 Cryptographic Token Interface (Cryptoki)".

Rails plugin to transparently encrypt attributes

Sentry provides painless encryption services with a wrapper around some OpenSSL classes