diff --git a/public/nip-49decrypt/connectivity-ping.txt b/public/nip-49decrypt/connectivity-ping.txt new file mode 100644 index 0000000..8e55469 --- /dev/null +++ b/public/nip-49decrypt/connectivity-ping.txt @@ -0,0 +1 @@ +pong diff --git a/public/nip-49decrypt/index.html b/public/nip-49decrypt/index.html new file mode 100644 index 0000000..6cd9d56 --- /dev/null +++ b/public/nip-49decrypt/index.html @@ -0,0 +1,1737 @@ + + + + + +NIP-49 — Offline Decrypt (Self-contained) + + + +
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+ Offline-only toolkit +

NIP-49 Offline Decryptor

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Bring your ncryptsec, pull the plug, and recover the private key entirely inside this single, auditable HTML file.

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+ 🔌 Works without a network connection + 🧮 Built-in libsodium + scrypt helpers + 📄 Export a self-contained copy +
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Runtime status

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Everything required for password stretching, AEAD decryption, and bech32 conversion ships directly with this page.

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Loading library versions…
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Decrypt your ncryptsec

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No telemetry, no calls home, no external dependencies. Take your device offline, paste your encrypted key and password to extract the 32-byte secret HEX and its bech32 nsec.

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YOU DEVICE IS CONNECTED TO THE INTERNET. This window will activate once no internet connection is detected.
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Quick start guide

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Follow these steps each time you unlock your nsec from a NIP-49 secret.

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  • + 1 +
    + Download, then go offline +

    Save this HTML file and open the page in your browswer, then disable Wi‑Fi and/or unplug Ethernet, the "Decrypt your ncryptsec" window will activate.

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  • + 2 +
    + Paste your protected key +

    Enter the full ncryptsec string and your password. The app derives the scrypt key and attempts XChaCha20-Poly1305 decryption locally.

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    + Record the results securely +

    Copy the 32-byte hex key or the regenerated nsec. Re-enable your connection only after you have safely stored the output.

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What’s inside this page?

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A curated bundle of battle-tested libraries, baked directly into the source so you can inspect every byte.

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  • libsodiumProvides crypto_aead_xchacha20poly1305_ietf_decrypt for authenticated decryption.
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  • Scrypt derivation helpersStretch passwords into 256-bit keys using the NIP-49 parameters.
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  • bech32 / bech32m toolsDecode ncryptsec payloads and emit friendly nsec outputs.
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Safety checklist

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Keep your keys safe with these quick reminders.

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  • Always verify you trust the source of this HTML file. Review it or host it yourself.
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  • Stay offline while working with secrets. Reconnect only after clearing the inputs.
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  • Use a unique, high-entropy password for each encrypted key.
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Don't Trust - Verify

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You don't need to trust anyone to run this code.

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  • You can save the contents of this HTML file (File - Save As/Save Page As)
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  • Read every line of code and look for yourse.f
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  • Export buttonGenerates a downloadable, self-contained HTML copy for air-gapped machines.
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Made for the Nostr community — portable, inspectable, and 100% offline.

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