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@ -260,7 +260,9 @@ https_proxy = 127.0.0.1:8082
* **Peer-to-peer**: No
* **Tor**: Depends
PGP (Pretty Good Privacy) isn't so much a messaging platform as it is a way of encrypting messages on top of existing messaging platforms (in this case, email). PGP email is the only option presented which does not have the encryption property of [*forward secrecy*](/glossary/#forward-secrecy). The goal of forward secrecy is to protect past sessions against future compromises of keys or passwords. It maintains the secrecy of past communications even if the current one is compromised. This means that an adversary could decrypt all PGP messages in the future in one fell swoop. Once you also take into account the metadata exposure inherent in email, PGP should be disqualified from inclusion in this list. It simply doesn't meet the standards of a modern cryptography. However, given that it is already widely used within the anarchist space, we include it here as a warning that it is not recommended. For a more technical criticism, see [The PGP Problem](https://latacora.micro.blog/2019/07/16/the-pgp-problem.html) and [Stop Using Encrypted Email](https://latacora.micro.blog/2020/02/19/stop-using-encrypted.html). We recommend switching to Element for asynchronous use cases, and switching to Cwtch for synchronous use cases. If you need to use email, use a [radical server](https://riseup.net/en/security/resources/radical-servers) and see the [Riseup Guide to Encrypted Email](https://riseup.net/en/security/message-security/openpgp).
PGP (Pretty Good Privacy) isn't so much a messaging platform as it is a way of encrypting messages on top of existing messaging platforms (in this case, email). PGP email does not have the encryption property of [*forward secrecy*](/glossary/#forward-secrecy). The goal of forward secrecy is to protect past sessions against future compromises of keys or passwords. It maintains the secrecy of past communications even if the current one is compromised. This means that an adversary could decrypt all PGP messages in the future in one fell swoop. Once you also take into account the metadata exposure inherent in email, PGP should be disqualified from inclusion in this list. It simply doesn't meet the standards of a modern cryptography. However, given that it is already widely used within the anarchist space, we include it here as a warning that it is not recommended. For a more technical criticism, see [The PGP Problem](https://latacora.micro.blog/2019/07/16/the-pgp-problem.html) and [Stop Using Encrypted Email](https://latacora.micro.blog/2020/02/19/stop-using-encrypted.html). [Privacy Guides](https://www.privacyguides.org/en/basics/email-security/) agrees that "email is best used for receiving transactional emails [...], not for communicating with others."
We recommend switching to Element for asynchronous use cases, and switching to Cwtch for synchronous use cases. If you need to use email, use a [radical server](https://riseup.net/en/security/resources/radical-servers) and see the [Riseup Guide to Encrypted Email](https://riseup.net/en/security/message-security/openpgp).
PGP is used for another purpose outside of communication: to verify the integrity of files. For this use, see our [GPG explanation](/posts/linux/#gpg-explanation).