[Cryptography] Leo Marks' 1998 talk about WW2 SOE code-making and breaking

[Kent Borg]

On 1/22/26 1:02 AM, Peter Fairbrother wrote:
> he dances around […] the method of verbally giving agents distress 
> codes which the giver couldn't remember.

I'm not sure what that means, but as I guess I am intrigued. Anyone have 
more to fill in what cleverness we couldn't be told? (And more 
description of the problem being solved?)

Thanks,

-kb