Three codes could be found in the CROSSING PATHS AT THE CASTLE – III post on the Investigate Ingress blog.

[1] e4h6y7p2m3xtaes

[2] skd10igsa323xn

[3] 3g6yailbxsa4w8n7

Code #1

Observations

This code was still live when writing this post.

Hint: There is one way to get the passcode format and a strange ecalP. Then it become an easy keyword sub

Code #2

Observations

Passcode format is there, go through your usual cipher routine

Code #3

Observations

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