Three codes were hidden in the ILLUSION AND REALITY post on the Investigate Ingress blog.

[1] rbjgkehbsrabfaubwrivsafmehbs

[2] 1308101809130802141208131914050823050809

[3] 4g52adet4rardnyn

Code #1

Observations

A roman emperor will guide you to the solve

Code #2

Observations

All numbers, easy grouping and once you see the range you’ll know what to do

Code #3

Observations

16 characters with the right amount of numbers for a valid passcode