1. Scyther script for the protocol.
https://www.dropbox.com/s/euqnwf0ds17zd6v/DTT%20Protocol%20Scyther%20Script.spdl?dl=0
2. EMV integrated circuit card specifications for payment systems, Book 2: security and key management, Version 4.3, EMVCo, LLC, November 2011
3. EMV integrated circuit card specifications for payment systems, Book 3: application specification, Version 4.3, EMVCo, LLC, November 2011
4. EMV payment tokenisation specification: technical framework, Version 1.0, EMVCo, LLC, March 2014
5. Apple pay, July 2015.
http://www.apple.com/uk/apple-pay/