Three codes could be found hidden in the HTML source of the In Different Times post on the Investigate Ingress blog.
[1] tshm35iga35cmb2
[2] 3645173717564516657656x6x6u67667376595u6
[3] 24hwge5105ry595
Code #1
Observations
15 characters with the right amount of numbers for a passcode format.
Spoiler
Code #2
Observations
40 characters, mostly numbers and a few letters in the high range.
Spoiler
Code #3
Observations
15 characters, we have enough letters for a prefix and suffix but way too many numbers
[hint]There is a keyword substitution in there[/hint]
Spoiler