Show Notes
George Fletcher joins Jeff Steadman and Sean O'Dell for a Decoded deep dive into transaction tokens (Txn-Tokens), the OAuth Working Group specification designed to secure requests as they move across microservices. George explains the problem transaction tokens solve: hop to hop security gaps, replayed access tokens, and the difficulty of tracking a single transaction across a graph of internal services. The conversation covers the anatomy of a transaction token, including the subject, audience, scope, and TXN claims, how a token's time to live should be scoped to the transaction itself, and why immutable parameters prevent tampering mid chain. George and Sean also explore how transaction tokens apply to AI agents and delegated authorization, referencing draft work on agent specific claims and cross domain trust. The episode closes with practical starting points for organizations of any size, including open source options and where to track the specification through the IETF OAuth Working Group.
Resources mentioned in this episode:
Transaction Tokens (base draft): https://www.ietf.org/archive/id/draft-ietf-oauth-transaction-tokens-11.html
Transaction Token Chaining Profile (Cross Domain Trust): https://www.ietf.org/archive/id/draft-fletcher-transaction-token-chaining-profile-02.html
Transaction Tokens for Agents: https://www.ietf.org/archive/id/draft-araut-oauth-transaction-tokens-for-agents-00.html
Tokenetes: https://tokenetes.io/
OAuth Working Group: https://github.com/oauth-wg
Decoded by Identity at the Center:
Jim McDonald: https://www.linkedin.com/in/jimmcdonaldpmp/
Jeff Steadman: https://www.linkedin.com/in/jeffsteadman/
Sean O'Dell: https://www.linkedin.com/in/seanodentity/
Visit the show on the web at http://idacpodcast.com
00:15 Introduction and catching up with Sean O'Dell 01:25 Introducing today's topic, transaction tokens and zero trust 02:26 George Fletcher joins the show 02:41 George's path into identity, from AOL to the Liberty Alliance 04:22 The problem that led to transaction tokens at Verizon Media 09:01 What a transaction token is, in plain terms 10:25 The specific problem transaction tokens solve 11:43 Transaction tokens versus a short lived access token 13:48 Delegated authorization, traceability, and the TXN claim 22:04 How long a transaction token should live 27:13 Local AI, vibe coding, and shrinking token lifetimes 28:45 What is inside a transaction token, the core claims 35:39 Call chains and the transaction context claim 39:05 Applying transaction tokens to AI agents 41:08 The transaction tokens for agents draft and the ACT claim 43:37 Getting started with limited resources, open source options 46:32 Scaling transaction tokens at a larger organization 50:38 What transaction token nirvana looks like 53:31 Whether this replaces a standard OAuth server 55:59 Where to learn more, the IETF OAuth Working Group 58:09 Cross domain trust and calling outside the enterprise 1:01:38 Alternatives to transaction tokens and adoption incentives 1:05:16 George's summary of the conversation 1:07:26 Sean's closing thoughts and takeaways 1:09:19 Wrap up and close
IDAC, Identity at the Center, Jeff Steadman, Jim McDonald, Sean O'Dell, George Fletcher, Practical Identity, transaction tokens, Txn-Token, OAuth, OAuth Working Group, zero trust, microservices, access tokens, JWT, authorization, delegated authorization, agentic identity, AI agents, call chain, token exchange, TXN claim, scope claim, Verizon Media, IETF, Keycloak, Tokenetties, cross domain trust, Decoded
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