Explore repeating-key Vigenère substitution with an explicit ASCII-letter key; not secure encryption.
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Classical substitutions are educational, not secure encryption. ASCII letters are transformed; case and other characters are preserved. NATO spells letters; digits use ordinary English names.
Your text, files, artwork and audio stay on your device. Self-hosted browser code processes everything without uploads or external content fetching.
Classical substitutions are educational, not secure encryption. ASCII letters are transformed; case and other characters are preserved. NATO spells letters; digits use ordinary English names.
No source is uploaded. Optional microphone input needs permission and remains local. Explicit clipboard/download copies remain outside cleanup.
Old downloads invalidate. Live audio updates or restarts its sweep as labelled. Stop/Clear/page exit release processing and media.
