Authenticated symmetric encryption
XChaCha20-Poly1305 (AEAD) protects file and message contents. Each chunk uses a unique nonce; any modification breaks decryption.
Encryption
Encryption details
The cryptographic primitives behind DRIVUNO, in plain language.
Password-based key derivation
Argon2id with modern parameters turns your password into a master key on your device. Memory-hard KDFs raise the cost of offline attacks dramatically.
Public-key cryptography
X25519 for key agreement, Ed25519 for signatures. Sharing and messaging use sealed boxes built on X25519.
Library
We rely on libsodium, a widely reviewed implementation of these primitives. We avoid proprietary cryptography.
Key wrapping
File-encryption keys are wrapped under the master key. Sharing wraps them under recipient public keys. Revoking a shared key invalidates that wrap.
Frequently asked questions
Is this 'military-grade encryption'?
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We deliberately avoid that phrase. The accurate statement is: DRIVUNO uses modern, widely reviewed cryptographic primitives via libsodium.
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