● Covered by 1 source · 1 reportLow impact1 neutral
Air-gapped file encryption tool released as self-decrypting HTML page
Key points
- Encrypts files into a single, self-decrypting HTML page.
- Requires only a web browser for decryption, no installation.
- Supports decryption using bare OpenSSL.
- Includes embedded OpenPGP signatures for audibility.
Self-Decrypting HTML for File Encryption
A new tool has been introduced that enables air-gapped file encryption, delivering the encrypted content within a single, self-decrypting HTML page. This approach eliminates the need for users to install additional software to decrypt files, requiring only a standard web browser.
Design Goals and Functionality
The project was inspired by self-extracting archives, aiming to provide a dependency-free method for sharing encrypted files. Key design goals included no installation requirements (beyond a web browser), self-decryption from a single file without network access, and full audibility of the process. The tool achieves this by manipulating HTML structure to allow decryption without compromising PGP signatures and supports decryption via bare OpenSSL.
Audibility and Reproducibility
Audibility is addressed through the self-contained nature of the decryption process and the availability of the source code. The tool also incorporates embedded OpenPGP signatures and aims for reproducible builds, though reproducibility currently depends on the operating system.
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Primary sources
GitHub ApelegHQ/ts-cms-ep-sfxReporting from
A new tool has been released that provides air-gapped file encryption, packaged as a single, self-decrypting HTML page. This development allows for sharing encrypted files without requiring external dependencies or network access for decryption, which simplifies secure file distribution.