Three codes were hidden in the MARTIN SCHUBERT: THOUGHTS ON THE RPG (ALSO: RPG SIGNUP SHEET) post on the Investigate Ingress blog.

[1] pratu74976qauq

[2] cud32mhfdk424if

[3] ■□□■■□■□■□□□□■■■■□□□□■□■■■□□■□■□■■□□■□■■■■□□■□□□■■□□■□■□■■□□■□□□■□□□■■□□■□□□■■■■

Code #1

Observations

If you apply the same old cipher and see the passcode format you are on the right track. You just need a bit of a twist

Spoiler

Make a 2×7 grid

We can see the passcode format if you read down but Qurt isn’t a keyword. Reverse rows 2, 4 & 6

Read going down from the upper left P

ptu97aura746qq

Passcode format is there, don’t forget to apply the same method to the keyword

Spoiler

Rot +1 gives

dve43nigel535jg

Nigel is Nigel Moyer but since we used Rot +1 we need to go to his next generation. Susanna Moyer is his daughter.

dve43susanna535jg

Count how many characters you have, split them up to see the pattern

Spoiler

We have 80 characters. In binary that would give us enough caracters for the prefix and suffix.

Make groups of 8

■□□■■□■□ ■□□□□■■■ ■□□□□■□■ ■■□□■□■□ ■■□□■□■■ ■■□□■□□□ ■■□□■□■□ ■■□□■□□□ ■□□□■■□□ ■□□□■■■■

Black squares are 0, white squares are 1

01100101 01111000 01111010 00110101 00110100 00110111 00110101 00110111 01110011 01110000

Convert binary to Ascii

exz54757sp

Not sure how to explain the keyword but Strong returned as valid

exz54strong757sp