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How to Protect Sensitive Documents With an Encrypted Vault

By DocFila Team · March 24, 2026 · 6 min read

Your phone holds more sensitive documents than you realize — tax returns, medical records, contracts, passport scans, financial statements, insurance policies, and legal agreements. If someone accesses your phone or your cloud storage is breached, all of those documents are exposed. An encrypted vault solves this by adding a dedicated layer of protection that goes far beyond your phone's lock screen.

Why Your Lock Screen Is Not Enough

A phone's lock screen protects the device itself, but it has significant gaps:

• Shared access. If you hand your unlocked phone to someone to make a call or look at a photo, they can browse your files, photos, and email.
• Cloud exposure. Documents synced to iCloud, Google Drive, or Dropbox are protected by your account password — but if that account is compromised, every file is accessible.
• Theft risk. A stolen phone that is unlocked or whose passcode is observed gives full access to all stored documents.
• App vulnerabilities. Regular file manager apps do not encrypt files at rest. If malware gains access to your storage, your documents are readable.

An encrypted vault stores each file as unreadable ciphertext. Even if someone copies the encrypted data, they cannot read it without your key.

What DocFila's Vault Does, Precisely

DocFila's Secure Vault gives each file one of three protection levels. They are not the same, and it is worth knowing which one you picked:

Standard: a lock, not client-side encryption

Standard items sit behind the vault's PIN and biometric lock and are stored in DocFila's cloud storage on Google Cloud, which encrypts them at rest. DocFila does not encrypt a Standard item on your device first, so it is protected by the lock, your account and our storage rules — not by a key only you hold.

Encrypted: AES-256-GCM on your device

Encrypted items are sealed on your device with AES-256-GCM before they are uploaded. The key is either a random key kept in this device's secure storage (Keychain, Android Keystore or the platform equivalent) or one derived from a password you set, and DocFila's servers never receive it. The cloud copy is ciphertext. The flip side: an Encrypted item opens only on a device that holds its key, or where you type its password.

Offline only: never uploaded

Offline-only items stay on this device and are never sent to DocFila's cloud. They are encrypted on the device only when zero-knowledge mode is on.

Zero-knowledge mode

Turn it on and new vault files are encrypted on your device with a master key that is created there and never sent to DocFila. DocFila cannot decrypt those files. Zero-knowledge mode shows you a recovery phrase once; keep it somewhere safe, because DocFila cannot restore your files without the key.

What is not encrypted

A vault item's title, description, tags, size, type and date are stored as ordinary records so the vault can list and search them. Do not put the secret itself in a file's title.

Step-by-Step: Setting Up Your Encrypted Vault

Step 1 — Open Secure Vault

Launch DocFila and tap "Secure Vault" on the home screen. If this is your first time, you will be prompted to set up authentication.

Step 2 — Set Your Vault PIN

Choose a PIN you do not use anywhere else. It unlocks the vault on this device. If you add an Encrypted item with its own password, that password derives the item's key: if you forget it, no one — including DocFila — can recover that file.

Step 3 — Enable Biometric Unlock

Turn on Face ID or fingerprint unlock for quick daily access. Your PIN remains as a fallback for situations where biometrics are not available, such as when wearing gloves.

Step 4 — Add Documents to the Vault

You can add files to the vault in several ways:

• Import existing files. Tap "Add" and select PDFs, images, or documents from your device or cloud storage.
• Scan directly to vault. Use DocFila's document scanner and save the scan directly to the vault instead of your regular storage.
• Move files from DocFila. Any document already in DocFila can be moved into the vault with a single tap.

Choose Encrypted when you add a file if you want it encrypted on your device before it is stored. The original copy remains in its source location — delete it manually if you want only the vault version to exist.

Step 5 — Organize With Folders and Tags

Create folders for different categories: "Tax Documents," "Medical Records," "Contracts," "IDs & Passports," "Insurance." Add custom tags to files for cross-category searching. For example, tag a medical receipt with both "Medical" and "Tax Deductible."

Step 6 — Decide Which Device Holds the Key

Standard and Encrypted items are listed on every device where you sign in. A Standard item opens anywhere once the vault is unlocked. An Encrypted item opens only where its key is: on the device that created it, or anywhere you type its password. If you need a file on several devices, give it a password.

What to Store in Your Vault

Any document you would not want a stranger to see belongs in an encrypted vault. Common categories include:

• Identity documents: Passport scans, driver's license, national ID, birth certificate, Social Security card
• Financial documents: Tax returns, bank statements, investment records, pay stubs, W-2 forms
• Medical records: Lab results, prescriptions, insurance cards, vaccination records, medical history
• Legal documents: Contracts, wills, power of attorney, property deeds, court documents
• Business documents: NDAs, partnership agreements, intellectual property filings, business licenses
• Personal documents: Insurance policies, vehicle registration, warranty receipts, educational certificates

Security Best Practices

1. Use a unique PIN and item passwords. Do not reuse a code or password from another service. If that service is breached, your vault could be compromised.
2. Enable auto-lock. Set the vault to lock automatically after 1–5 minutes of inactivity. This protects you if you set your phone down while the vault is open.
3. Delete unencrypted copies. After importing a document into the vault, delete the original from your regular file storage, photo library, or cloud drive.
4. Keep your item passwords and recovery phrase backed up. Store them in a physical safe, a dedicated password manager, or another secure location separate from your phone.
5. Review vault contents periodically. Remove documents you no longer need. Fewer stored documents mean less exposure in any scenario.

Start Protecting Your Documents

Related DocFila tools

Keep going with the document workflow that matches this page. Open the tool you need, then finish the file in DocFila.