FeaturesFeatures

Post-quantum file encryption

• Encrypt any file type. The original filename is never exposed.
• Decrypt and recover the original file instantly.
• NIST FIPS 203 + FIPS 204 standardized algorithms.
• Everything runs in your browser. No file is ever uploaded.

Quantum-safe messages

• Encrypt a message and share it as a link.
• The ciphertext lives in the URL fragment, never on any server.
• Same cryptographic pipeline as file encryption.

Agent & developer tools

• MCP server: encrypt, decrypt, sign, and verify as agent tool calls. Built and tested; its npm release as @kvant/mcp is next on the roadmap.
• The wallet is a portable identity: same keys in the browser and over MCP.
• Sign x402 payment receipts with ML-DSA-65 for verifiable provenance.
• Runs locally over stdio. No network I/O, no telemetry.

Wallet-native key management

• Derive your encryption identity from an EOA wallet with one signature, no gas.
• First use on a device asks for two signatures and refuses a wallet whose signatures differ, so the keys are reproducible.
• Or generate an encrypted key file and use it offline. Back up wallet keys as a key file anytime.
• No password stored anywhere. You own your keys.

Token gating

• Free tier available to everyone, no token required.
• $KVANT holders unlock higher daily quotas and larger file sizes.
• Your tier is the USD value of your $KVANT, read on Robinhood Chain when your wallet connects.