Simple captcha based on plain text questions.

Retrieve time objects by time windows (e.g. TimeWindow.call('5m') will round minutes to multiples of 5).

Touch a parent's collection on ActiveRecord.

Password Validators including Dropbox ZXCVBN algorithim

Generate random unambiguous strings (no ilo06b2z chars)

Create and verify signed urls. Supports expiration time.

Plugin based attribute system for ruby objects

WebAuthn implementation for Ruby