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

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.

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

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