Security model
ShareFiles uses Web Crypto only: ECDH P-256 key agreement, AES-256-GCM encryption for every chunk, and SHA-256 integrity checks. Relays never see plaintext.
Need help? Please see the guide or the FAQ
Every step is written out, and the most common questions are answered.
Two layers of encryption
Every WebRTC link is encrypted with a fresh ECDH key exchanged in the QR codes (on top of WebRTC's own DTLS). Every file chunk is also encrypted end-to-end to the receiving device's key, so a relay in the middle only forwards ciphertext.
Integrity
Each chunk carries its SHA-256 hash and the whole file is verified after reconstruction. A mismatch stops the transfer with FILE CORRUPTED and nothing is saved.
No absolute claims
No software is 100% secure. Verify you are pairing with the right device by checking its ID, and keep your browser updated.