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The keys are generated client-side, and encryption is done client-side, the encrypted data is then sent to the app. On sharing, the key is encrypted for the recipient and sent to them through the Tanker server. Neither Tanker nor the app can see the clear data or keys.

Tanker is an open-source client SDK that can be embedded in any application. Encrypt data, share it between users, create groups, etc.

The SDK handles key exchanges, cryptographic operations, and identity verification for you.

Also available for iOS and Android!