An overview of the current state of GnuPG for e-mail encryption and signing

TL;DR: Use ECC-based keys (Ed25519, Curve25519) as they are the future-default of GPG, smaller and faster than RSA, and Curve25519 is widely used by many different projects. If you use modern E2EE instant messengers for personal communication, there is likely no need to switch to GPG.

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