Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
In Part 1 of this series, we reviewed how public key encryption (PKE) uses a pair of keys, one to encode and one to decode. As well as being the strongest known form of encryption, PKE is more secure because you no longer have to keep the encoding key secret--you can publish it openly. So it's easy for field agents to replace any headquarter keys that are compromised.
Now you're ready to encrypt a file or many files and using key management.