Encrypted on your iPhone
Every file encrypted on your iPhone. Every key yours.
Many 'vault' apps only hide files behind a PIN screen. VaultBolt encrypts each item before it is written to storage, encrypts the index of names and folders too, and never sends a key to anyone, including us.
How it works
Encrypted on your iPhone, step by step.
Your unlock becomes a key
Your PIN, pattern or passphrase runs through Argon2id, a memory-hard function that makes guessing slow, mixed with a secret from the Secure Enclave.
That key unlocks the vault key
A random 256-bit vault key is wrapped by your unlock key, so changing your PIN never re-encrypts your library.
Each file gets its own key
Files are sealed in chunks with AES-256-GCM, so damage or tampering is detected and large videos stream without decrypting everything.
Locking forgets the keys
When the app locks or goes to the background, keys are dropped from memory.
Names and folders are encrypted too
The vault index, thumbnails and metadata are encrypted, so a copy of the app's storage reveals no filenames or albums.
Bound to your device
A secret held by the Secure Enclave is part of the key, so a stolen disk image cannot be brute-forced on a fast computer.
No back door
There is no master key and no account. Support cannot open your vault, which is why your recovery phrase matters.
Honest limits
- Encryption protects stored files, not a file you have opened on screen.
- A short PIN is weaker than a passphrase against someone with your unlocked, jailbroken device.
- An independent audit and public whitepaper are planned before launch.
FAQ
Encrypted on your iPhone: common questions
What encryption does VaultBolt use?
AES-256-GCM authenticated encryption for file content, thumbnails and the vault index, with Argon2id key derivation and a Secure Enclave-bound secret.
Can VaultBolt see my photos?
No. Files are encrypted on your device with keys that never leave it. There is no VaultBolt account and no copy of your keys on any server.
Is AES-256 secure?
AES-256 is the standard used by governments and banks and has no practical attack. In practice, the strength of your unlock and the safety of your device matter more.
Related features
Unlock your way
Draw a pattern, type a PIN or passphrase, or use Face ID and Touch ID, with a strength hint as you set it up.
Recovery phrase
12 words, checked when you set them up, that restore your vault on any iPhone without an account.
Encrypted iCloud backup
Uploads to your own private iCloud already encrypted, on every plan. Restore anywhere with your 12-word phrase.
VaultBolt
Your stuff. Locked in.
Get VaultBolt for iPhone and iPad, or see exactly how it works in the interactive demo vault.
