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41 lines
1.3 KiB
Org Mode
41 lines
1.3 KiB
Org Mode
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#+TITLE: File encryption with GPG
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#+ROAM_TAGS: tools security
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GPG is mostly used for public-key cryptography, allowing you to publicly communicate with the recipient.
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Using GPG boils to generating a key-pair, managing them, and signing and receiving encrypted messages from others and/or to yourself for security purposes.
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* Basic usage
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A GPG key-pair is made up of two things: the public key and the private key.
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The public key can be shared... to the public while the private key should be guarded in secret.
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#+BEGIN_SRC shell :results silent
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# List out the available keys.
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gpg --list-keys
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# Generate a new key-pair.
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gpg --full-gen-key
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#+END_SRC
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* Encrypting and decrypting files
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Encrypting and decrypting files are one of the main points of GPG.
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#+BEGIN_SRC shell :results silent
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# This will encrypt a file and generate an obscured version of it at <FILE>.gpg.
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gpg --recipient <EMAIL> --encrypt <FILE>
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# Decrypting is almost the same process.
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gpg --recipient <EMAIL> --output <FILE> --decrypt <FILE>.gpg
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#+END_SRC
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You can make more secured versions of encrypted file especially when you intended it to send it to a particular recipient.
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For example, you can encrypt your file with your private key and the public key of your recipient and only both of you know how to receive the file.
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