Blockchain Use cases and Identity

I just came across with Don Tapscott’s TED Talk titled “How the blockchain is changing money and business” . In it, he talks about 5 potential use cases of blockchain technology that may result in transformations for a prosperous world. They are: Protecting rights through immutable records, e.g., land title. In many places …

FAPI Presentation at Open Data in Finance Conference @ London

Here is the presentation file that I used for my 10 minutes OpenID Foundattion Financial API WG presentation at the Open Data in Finance Conference ( June 15, 2016). To join the Working Group, please sign the IPR Contribution agreement online by clicking here or download the PDF form and fill it, scan …

Open Data in Finance Conference: Chair’s Welcome

Here is the script of the Chair’s remark at the opening of the Open Data in Fianance Conference in London (June 15, 2016) 09:00 – 09:10 Chair’s Welcome Nat SakimuraSenior ResearcherNomura Research Institute Hello. Welcome to the Open Data in Finance Conference. I am really excited to be a part …

Authorization Delegation: A financial accounts aggregation use case

I have many bank accounts. If I wanted to use a new and shiny graphing service, I have to get authorization from each banks individually. That’s a bit of nuisance. Instead of doing that, if I can instruct each banks to delegate authorization on my accounts to my Authorization server, …

Code phishing attack on OAuth 2.0 [RFC6749]

Code phishing attack is the attack that the adversary obtains the code and client credentials from the legitimate client and uses them against the honest token endpoint to obtain tokens thereby accessing the protected resources illegitimately. Assumptions There are not much assumptions needed for this attack. The client and the server …

Happy New Year!

2015 was a hectic year: Bunch of the specs that I have been working on (JWS [RFC7515], JWT [RFC7519], OAuth PKCE [RFC7636], JWK Thumbprint [RFC7638])got published and the work to convert ISO/IEC 29100 Privacy Framework into Japan Industry Standard started. We had OpenID Summit Tokyo 2015 gathering around 500 audience also. (The last time was back …