@jonn to be fair he was operating in Switzerland and it didn’t matter that much. Things were much worse with other parts of the red orchestra. Like the whole network that got collapsed because the code for encrypting data was incorrectly executed.

There was a double encryption pass, and then an encryption pass that was changed every day. There were 31 “keys” and it was meant to be used as a 1:1 mapping to the day of the month. But the guy using it thought it was a rotating key. So the first two months everything is fine. On day 31 he uses key 31, and then he rotates and starts at key 1 which is for them the day 1 key. But then there is the 30th (key 30) and then the 1st .. for him key 31, and for them, key 1. And they can’t decrypt. Then the 2nd, for them key 2, but for him key 1. And so it gets more and more out of sync and they don’t know what has happened.

So they sent the address of the guy running the radio to another agent with the instructions to go over there and figure out wtf is going on with the crypto codes. the Germans record all these messages, and it turns out that the “go to this address” gets broken some months later. And the Germans go to that address. And it all falls apart.

I always found it interesting how the problem was a mistake in training on the encryption, followed by the mistake make while trying to fix the first problem. Mistakes only accumulate.