Offline Encrypted File Vault for Windows
An offline encrypted vault keeps the protected copy of your files on your own Windows PC instead of requiring cloud storage. That does not remove the need for backups, strong passwords, or careful recovery planning—it simply changes where the encrypted data lives.
What to look for in a local encrypted vault
- Authenticated encryption so modified ciphertext is detected rather than silently accepted.
- Clear explanation of when files are encrypted and when plaintext exists.
- Strong password-based key derivation rather than using passwords directly as encryption keys.
- Backup guidance for the encrypted vault itself.
- Honest recovery limits if passwords, key files, or device bindings are lost.
- No claim that SSD secure deletion is guaranteed when the storage hardware cannot promise it.
Local does not mean “backup not needed”
If the only copy of an important document is inside one encrypted vault on one SSD, hardware failure can still destroy it. Keep encrypted backups outside the primary machine and verify that you can reproduce every password, key file, or device requirement needed to unlock them.
Plaintext behavior should be explicit
Any vault that lets you open and edit normal files has to make plaintext available somewhere while those files are in use. The important question is whether the product explains that behavior clearly and removes its working plaintext when the vault is locked again.
How QuadCrypt approaches it
- Local-only encrypted vault storage on Windows.
- Four required passwords.
- Argon2id password hardening.
- AES-256-GCM authenticated encryption layers.
- Optional key files and optional Windows user/PC binding.
- Encrypted backup and recovery-guide tools.
- Explicit warning that Khuna Labs cannot recover lost vault secrets.