• OATH Reference Architecture Version 2.0
• OATH Reference Architecture Version 1.0

• HOTP: An HMAC-Based OTP Algorithm (RFC 4226)
  TXT from IETF web site | Acrobat PDF

• OCRA - OATH Challenge/Response Algorithms Specification
  Version 11 draft from IETF web site
• TOTP - Time-based One-time Password Algorithm
  Version 5 from IETF web site

Provisioning

• IETF KeyProv Working Group
  - PSKC - Portable Symmetric Key Container
  - DSKPP - Dynamic Symmetric Key Provisioning Protocol.
  Link to KeyProv WG
• IETF Bulk Provisioning Protocol
  Version 1 draft from IETF web site | Acrobat PDF

Validation

• VALID: Authentication-Data Validation Service Interface definition
  Version 00 draft from IETF web site

Other

• OATH Token Identifier Specification
  - Specification
  - List of registered manufacturer prefixes (OMPs)
  - Register a new prefix (OMP)
  - FAQ
• ThraudReport: How to Share Transaction Fraud (Thraud) Report Data
  - Version 9 draft from IETF web site
  - OATH Thraud Specifications Page