SigDeck (OfflinePainter)

Fully air-gapped Ed25519 file-signing toolkit with QR-based key exchange.

Desktopfreeglobal

SigDeck (OfflinePainter) is a fully air-gapped Ed25519 file-signing toolkit that signs files, verifies signatures and exchanges keys via QR code using a pure-Python, dependency-free implementation with no network access required. It targets security-conscious individuals who want cryptographic signing on a machine with no network connection and no reliance on the system clipboard.

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