[tabletopneedle]

Tl;dr

Curve25519 for 128-bit security, to use with 128/256-bit symmetric cipher.

X448 for 224-bit security to use with 256-bit symmetric cipher.

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For symmetric ciphers choose any of the three below:

-ChaCha20-Poly1305

-Salsa20-Poly1305

-AES-GCM.