[ale] OT:pgp, linux and ham radionetworking

[development at combiz.net (Rod Young)]

Hello I am KF4UWL. I am currently setting up a latop with debian to use 
among other things in packet radio.
We hams have packet BBS's but we are not allowed to use codes and 
ciphers. (Though the average scanner would disagree after hearing our 
jargon.) I think I may have found a way to securely verify a user on ham 
radio and would like to get a rules clarification from the FCC if it 
works.
How about using PGP or a related technology not to encrypt but to digital 
sign the password? Is the singnature dynamic or static? In other words 
could a third party intercept a login and copy it then resend later to 
spoof the system?

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