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About Encryption
1- Secure exchanges with OpenPGP

Click here to download my OpenPGP public key (text file)
You can then check its fingerprint, that should be: 8E70 B18F 23ED 615D C061 046A 8335 AB09 577D F8EE

If you don't understand why you should encrypt most of your administrative and professional messages, please refer to this link.
This paragraph is a summary of GnuPG commands, for convenient use. I mainly relied on this document to write it.
You may publish your public key on your website, in your email signature, or on this or thatserver.

     a- Keys management
Generate a pair of keys gpg --gen-key
Generate a revocation certificate gpg --gen-revoke
Edit the keys gpg --edit-key
(eg. sign someone's public key with my private key)
Export public keys gpg --export -a
Export private keys gpg --export-secret-keys -a
Import keys gpg --import
Display keys fingerprint gpg --fingerprint
Erase a public key gpg --delete-key
Erase a private key gpg --delete-secret-key
List public keys gpg --list-keys
List private keys gpg --list-secret-keys
List signatures gpg --list-sigs

     b- Crypt and Sign
Produce a crypted message file gpg --encrypt -a your_message.txt > crypted_message.txt
(use the public key of the recipient, this insures that your message won't be read by someone else)
Produce a signature attachment file gpg --detach-sign -a your_message.txt > signature.txt
(use your private key and the crypted message content, this insures that your message is sent by you)
Produce a single compressed file including both gpg -u exp -r dest -a --sign --encrypt your_message.txt > signed_message.txt

     c- Check and Decrypt
Check a signature attachment file gpg --verify their_signature.txt their_message.txt
(use the public key of the sender and the crypted message content, this insures that your message has been sent by the signee)
Decrypt a crypted message file gpg --decrypt their_message.txt > message.txt
(use your private key, this insures that your message has not been read by someone else)
Check and decrypt at once a single compressed file gpg --decrypt their_message.txt > message.txt

     d- Symmetrically Encrypt/Decrypt
Encrypt a document gpg --encrypt --symmetric -a your_document.txt > crypted_document.txt
Decrypt a document gpg --decrypt --symmetric your_document.txt > document.txt
(use your private key for encrypt and decrypt, this insures that a document has been encrypted by you and can be decrypted only by you)
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