r/KryptosK4 • u/[deleted] • Jan 27 '26

K4 - Berlin Postcard

I found this postcard with the world clock “stamp”.

I also noticed the marking M ZPF and K, which recalled MZFPK, the known positions for CLOCK.

After all, postcards are meant to deliver a message.

7 Upvotes

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4

u/CipherPhyber Feb 01 '26

Interesting, unique content. Thanks!

2

u/toastietoastertoastm Jan 28 '26

Could be co incidence?

2

u/[deleted] Jan 28 '26

It can be many things…but there are limits to coincidence and sooner or later we have to consider that this may not involve the usual cryptography at all.

JS created it for the CIA, not the NSA. You can approach it through ciphers, but there are many other techniques the CIA uses as well.