03 · Encrypted Sender

Transmit with encryption

Optionally protect the payload with a password before streaming. The file is encrypted with AES-256-GCM (PBKDF2 key derivation) — the receiver must supply the correct password to decrypt and download.

Configuration

🔓 Encryption — optional

Password (leave empty to skip encryption)

Payload file

Grid size — spatial multiplexing (N × N)

Frame interval — temporal multiplexing

Chunk size (raw bytes / QR)

QR error-correction level

Loop cyclically (reliability via redundancy)

Load a file to preview the QR stream

Codes / frame

—

Total chunks

—

Frames / cycle

—

Est. cycle time

— s

Frames shown

Cycles

idleraw goodput ≈ — kbps

No password set — the stream is transmitted in the clear, identical to the standard /tx page.