The street outside Rockefeller Center was a very busy place to hide a secret message, I thought, but sometimes the best place to hide something was in plain sight. I'm a government agent, from one of those alphabet agencies, investigating corruption in international song competitions. I was going to meet an unknown contact for information, but first I had been told to find a message here.
The note I had to find was taped to the bottom of a park bench; standard stuff, really. I recovered the note and opened it to find the following handwritten message.
WHERE ARE YOU?
← → ← →
DMUQBAA ZPBLKBKL: KJEOQDMYB
I obeyed the final message, walking to meet up with my contact in a bar nearby. But I didn't know anything about them! Perhaps the cyphertext would give me information, or at let me know who I was looking for.
What does the message say?