Subfile Puts a Private Vault Inside an Ordinary File

Field notes

The product creates an encrypted container from a folder, then either keeps it as a standalone vault or embeds it in a carrier file that continues to behave like its original format. The visible demo uses sample categories such as contracts, passports and IDs, tax and legal files, private keys, and seed phrases. Its technical description names Argon2id and XChaCha20-Poly1305, while the site’s navigation exposes a container-format page, reference reader, threat model, and audit log.