Recipient approval: when the link alone is not enough

Recipient approval (Trust-Key) is an optional protection for especially sensitive messages. When enabled, an intercepted or forwarded link cannot open the message — only after you approve the recipient device once. It is off by default.

Vorteile der Zero-Knowledge Architektur

Intercepted or forwarded links are worthless
Only the device you approved can decrypt the second key half (ECDH P-256)
Server never sees plaintext, private keys or the second half
Once a device is trusted, future messages open automatically

Häufige Fragen (FAQ)

Does recipient approval protect against intercepted links?

Yes, for confidentiality. The key is split in two; one half is in the link, the other is only released encrypted for the approved device after you approve.

Is zero-knowledge preserved?

Yes. Encryption and keys stay in the browsers. The server only stores ciphertext, public recipient keys and the encrypted access package.

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