Key pair for every actor vs single instance-wide key pair

[nutomic]

Soapbox switched to a single key pair for the whole instance a while ago.

How I saved gigabytes by deleting all RSA keys

Storing RSA keys for every user consumes gigabytes of disk space. I have seen companies that use Mastodon point to this as a reason not to federate, and then delete those giant columns from the database. To solve this problem, I first tried deterministic RSA. I generated the keypair from the user ID and a shared secret at runtime. This worked good for a year, until activity grew and it started destroying my CPU performance. So here is the neat trick. You don’t need more than one RSA keypair a…

I also intend to do this for Lemmy in the future, as it’s a huge waste of disk space to store so many individual keypairs.