Three codes were hidden in the New Brain-Machine Interface in Development post on the Investigate Ingress blog.
[1] w2atk9qnu8ca73qu
[2] xx6yf238pxzxolp7qx4fjf1f9ppllf7j
[3] btzdjfefdfcfmh
Code #1
Observations
16 characters with the right amount of numbers for a valid passcode.
Code #2
Observations
Convert and how can you group it.
Code #3
Observations
All letters but some have a particular range