Prototypes Nordlys FysioterapiP4 · Encrypted form
Nørrebrogade 10, Copenhagen NMon to Fri, 08 to 16

Contact the clinic

Your answers are encrypted in this browser before they are sent. The clinic’s key is the only key that opens them. Use made-up details: this is a prototype.

Only the clinic sees it.

Encrypted for key

What the server receives

Nothing yet. After you send, the envelope is shown here exactly as it is stored.

JSON
How Nordlys Fysioterapi is built
  1. The form makes a new key pair for this one answer.
  2. It combines its private key with the clinic’s public key. HKDF turns the result into an AES-GCM key.
  3. The answers are encrypted with that key. The envelope holds the form’s public key, the salt, the nonce and the ciphertext.
  4. The form’s private key is thrown away. After sending, not even this browser can open the answers again.