Weak model-specific encryption key detected

• Rule ID: ruby_rails_weak_custom_key
• Languages: ruby
• Source: weak_custom_key.yml

Description

To ensure effective encryption, model-specific encryption keys should be 12 bytes or greater.

Remediations

❌ When using model-specific encryption keys, the minimum length you should use is 12 bytes

class User < ApplicationRecord
  encrypts :email, key: "weak-key"
end

Resources

• Rails encryption setup and recommended key practice
• Rails encryption - model-specific keys

Associated CWE

• CWE-326: Inadequate Encryption Strength

OWASP Top 10

• A02:2021 - Cryptographic Failures