One code could be found hidden in the HTML source of the Disinformation post on the Investigate Ingress blog.
[1] nrhwjckujsllelpsklemeshetkrrvvuxwggigzvlzzevvnsxiqmejkiqwtyxhpqxyvene
Code #1
Observations
You need to find the first passcode to help you get the second passcode to help you get the third passcode AKA easy as 1, 2, 3