Posts tagged "vault" — TwinMail Blog

March 8, 20263 min readDylan DahalSecurity

Why we chose XChaCha20-Poly1305 over AES-GCM for vault encryption

A detailed comparison of cipher suite tradeoffs for local-first email storage, including nonce safety, key derivation, and performance on consumer hardware.

encryption XChaCha20-Poly1305 AES-GCM

March 1, 20263 min readDylan DahalEngineering

Building a local-first CRDT sync layer for encrypted email vaults

How we designed a conflict-free replicated data type layer that operates on encrypted vault boundaries without exposing plaintext to any sync server.

local-first CRDT sync

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