Forgive my ignorance - maybe someone can help.
My understanding the most secure comm method is the One Time Pad.
Downside: Both the sender and the receiver must have the same set of keys.
If this is accurate, how does the sender get the key to trusted allies far across the country without making the trip and putting it in his hand? Do you trust a generic UPS or FedEx package? This is a bit of tradecraft I never bothered with learning.
K
