Right amount of letters and numbers for a code, just need to find a way to rearrange them.

[hint]There is a substitution in there but that song title was used way to many times[/hint]

Spoiler

When a code starts with a number I usually try skip first. Skip of 2 gives

8cxp9t9g3mkcutsnouoy

Let’s split that

8cxp9t9g3m kcuts no uoy

So we have to find a substitution for Stuck on you. Searching on Google gives a movie and a few songs. You’ll need to dig deep but a group called Failure made a song called Stuck on you. You’ll probably see the cover Paramore made before you get the Failure reference.

8cxp9failuret9g3m

Code #2

Observations

Good distribution for hex but not in the right range.

[hint]It’s hex to dec but you’ll need to work out the range[/hint]

Spoiler

Let’s start by making pairs to see if we can spot something

ab 87 88 8a a9 7c 96 98 7d 96 7b 7c 97 af 77 ad 9a

Notice how the number positions all start with A ? We know that in hex to Ascii numbers start with 3. In the past hex “atbash” was used but it’s usually C than becomes 3. Let’s look at that hex “Atbash” again:

0

F

1

E

2

D

3

C

4

B

5

A

6

9

7

8

8

7

9

6

A

5

B

4

C

3

D

2

E

1

F

0

Interesting how A=5. Notice also that in the code numbers from 0 to 5 are not used. Let’s convert the code using that index ab 87 88 8a a9 7c 96 98 7d 96 7b 7c 97 af 77 ad 9a 54 78 77 75 56 83 69 67 82 69 84 83 68 50 88 52 65

The conversion now gives a valid decimal to Ascii string.

6NMK8SECRETSD2X4A

Code #3

Observations

Code format is right there, just go through your regular cipher routine.

Spoiler

ROT+11 is the way to go. Don’t forget to apply the same thing to numbers, to make it easy you can simple add 1 to all numbers.