← Saturday, September 26, 2026SecurityTool

Self-decrypting HTML packages air-gapped file encryption with OpenPGP signatures

cms-sfx-demo.apeleg.com Editor score 7/10

The single-file tool decrypts offline in a browser, embeds OpenPGP signatures and aims for reproducible builds, though the author notes an OS dependency. Its design offers a useful case for engineers balancing portability, auditability and secure file sharing.

What
Self-decrypting file sharing packages encrypted content as a single HTML page that needs only a browser and no network.
How
Embedded OpenPGP signatures and sort-of reproducible builds support auditability; the HTML structure permits decryption while preserving the PGP signature.
Why it matters
An auditable, dependency-light delivery format can support offline file exchange, including decryption with bare OpenSSL.

Discussion

Discussion is not switched on yet. Use Note above to keep your own thoughts on this story.

Headline, summary, brief and diagram are written by a model from the source's own text; the link, byline and numbers come from the source. Read the original before relying on a claim.

Your note

Private to you. Stored in this browser, and synced to your account when you are signed in.