This is an anonymous blog, and the author conceals their identity, which is already an issue for me. Let's look at the alternatives to PGP that the blog recommends, I will paraphrase:
1) Sign software with sigstore.dev
The issue here is that you delegate trust to places like GitHub or other OIDC providers. You also have to trust Fulcio and their CAs. <https://docs.sigstore.dev/about/security/> for details. Maybe you don't want to do that, in part because you're not guaranteed that the service will remain free, or perhaps you're more serious about security than GitHub.
1-alt) Sign software with minisign.
Maybe I don't want to use Ed25519. Maybe I want to revoke the signatures. There's many issues one may have with minisign.
2) Signing git tags/commits
Advises to use SSH, no explanation why. Advises Ed25519, why not Ed448? The explanation to not use RSA is by linking to <https://blog.trailofbits.com/2019/07/08/fuck-rsa/>. I will only quote one thing from this article:
>RSA was an important milestone in the development of secure communications, but the last two decades of cryptographic research have rendered it obsolete.
You can't say it is obsolete when it is still in use. I'm not sure what the author(s) mean by "obsolete", but it is not true that RSA is obsolete. (If Ed25519 breaks but RSA doesn't, who will be obsolete?)
3) Sending files between computers
Here it recommends Magic Wormhole. That's shocking to me, I don't understand why it is recommended. Why not rsync? If you look at the 2016 presentation for Magic Wormhole <https://www.lothar.com/~warner/MagicWormhole-PyCon2016.pdf>, the pitch is that it is especially useful when the computers are unrelated. How often is that the case? Rsync is a much better solution for anyone who wants to transfer files between servers they have access to.
4) Encrypting Backups
Here they recommend tarsnap as "the usual recommendation", I've got to say, it's definitely not the usual recommendation.
5) Encrypting Application Data
They say to use Tink or libsodium. Tink has many implementations in each language, (how does that help security?) and libsodium doesn't support RSA, two things on top of my head that may be deal breakers.
6) Encrypting Files
They recommend age; wishful thinking as most people do not use age. In fact most people do not bother encrypting files, and it is not something that is done often. The author likes to talk about footguns, well there's certainly many footguns to file encryption. This is where the most analysis is on this blog article too, but this is a niche case.
7) Private Messaging
It recommends Signal. What about e-mail?
>(Unless you’re legally required to use PGP because of a government regulation… in which case, why do you care about my recommendations if you’re chained by the ankle to your government’s bad technology choices?)
It comes off as know-it-all.
Let me close with this: Cryptography is infamous for debates. It never ends, and many people have ended up with egg on their face for their claims. Tread carefully and don't rely on others too much!
