Three codes were hidden in the HTML source of the MESSAGE TO MISTY post on the Investigate Ingress blog.

[1] fcfclp73zz9flfrz6qfxv579plfycx3x

[2] ttfnhykpoiettfrlw

[3] 4fne8myawm7m5srt

Code #1

Observations

Long string with no specific range should be enough to point you to the cipher

Spoiler

Morse is always a good starting point for strings like these

..-. -.-. ..-. -.-. .-.. .--. --... ...-- --.. --.. ----. ..-. .-.. ..-. .-. --.. -.... --.- ..-. -..- ...- ..... --... ----. .--. .-.. ..-. -.-- -.-. -..- ...-- -..-

There are 135 bits. Make groups of 5 and substitute . for 0 and – for 1. Then convert binary to decimal

`00101`		`5`
`01000`		`8`
`10101`		`21`
`00100`		`4`
`01101`		`13`
`10000`		`16`
`00111`		`7`
`10011`		`19`
`00111`		`7`
`10001`		`17`
`00100`		`4`
`00100`		`4`
`10110`		`22`
`01000`		`8`
`01101`		`13`
`00101`		`5`
`00100`		`4`
`01000`		`8`
`00110`		`6`
`00111`		`7`
`10011`		`19`
`00100`		`4`
`00101`		`5`
`01110`		`14`
`10100`		`20`
`10001`		`17`
`11001`		`25`

5 8 21 4 13 16 7 19 7 17 4 4 22 8 13 5 4 8 6 7 19 4 5 14 20 17 25

Convert numbers to letters using a=0

FIVENQHTHREEWINFEIGHTEFOURZ

5nqh3winf8e4z

Code #2

Observations

Not much to work with but a rarely used rearrange cipher will reveal most of the answer

Spoiler

A railfence of 3 gives

tyfktprofilentwth

2yfk2profilen2w2h

Using a bit of brute force to figure which t is 2 or 3 you get

2yfk2profilen2w3h

Code #3

Observations

16 characters with the right amount of numbers for a valid passcode but… Try to find the password first then you’ll be able to figure how to rearrange everything

Spoiler

A regex search using ^[4fne8myawm7m5srt]{6}$ reveals that only 2 keywords are possible: Answer and Safety.

Let’s start by making a 4×4 grid

`4`	`f`	`n`	`e`
`8`	`m`	`y`	`a`
`w`	`m`	`7`	`m`
`5`	`s`	`r`	`t`

Had to try different combinations of rearrange to get the keyword to match up but in the end here is the sequence

Reorder columns as 1, 4, 3, 2

`4`	`e`	`n`	`f`
`8`	`a`	`y`	`m`
`w`	`m`	`7`	`m`
`5`	`t`	`r`	`s`

Shift column 1 up by 1, 2 by 1, 3 by 2 and 4 by 1

`8`	`t`	`7`	`m`
`w`	`e`	`r`	`m`
`5`	`a`	`n`	`s`
`4`	`m`	`y`	`f`

Read from the lower left 4

4myf5answerm8t7m

Code #1

Observations

Code #2

Observations

Code #3

Observations

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