GPG is your best way to protect confidential information.
GNU Privacy Guard
, an excellent, public domain, FOSS
tool for ensuring privacy and security on the Internet (plus
more). GPG is distributed under GPL (GNU Public License, a
liberal license which grants you several liberties). GPG is
With GPG and my public key, you can encrypt any message, or
file, and send it to me. Only I can decrypt your message because only
I know the corresponding private key (aka "secret key") for
doing this decryption. The encryption cannot be broken by anybody
else. This is the principle of what is known as public key
cryptography (PKC). GPG does many more things, in addition to PKC.
The GPG web site has lots of very well written tutorials on cryptography, and security. You can also download the GPG tool from this site. In general, GPG comes free, with all standard Linux distributions (unlike that other fliMSy-cluMSy-MeSsy operating system).
A neat overview and intro to GPG is here.
A well -organised catalogue of GPG commands is here.
Learn some cryptography here, and then, take a look at Partha's public key
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Simplicity is divine.
E W Dijkstra (1930-2002)
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