Devise-Two-Factor Authentication Uses Insufficient Default OTP Shared Secret Length

Summary Under the default configuration, Devise-Two-Factor versions 1.0.0 or = 4.0.0 & 6.0.0 generate TOTP shared secrets that are 120 bits instead of the 128-bit minimum defined by RFC 4226. Using a shared secret shorter than the minimum to generate a multi-factor authentication code could make ...