BlindLock hides your password manager and secure vault in a PNG image — also offers secure notes, 2FA, and a crypto address book, with optional hardware security keys
Local-only app keeps this sensitive info fully encrypted and steganographically concealed on your device.
A new local‑only password manager, notes app, and secure vault that hides your secrets in an ordinary-looking .PNG image file is now available. BlindLock does all this and more with an option to bind to your hardware using TPM2.0, Secure Enclave, or StrongBox. No cloud storage or central vault account is required, and the dev is selling lifetime licenses at $49 (for now). There is an interactive online demo, with nothing uploaded or downloaded, as well as a downloadable full 7-day demo available.
BlindLock’s solo developer David Domingo indicates that one of the main drivers behind his efforts to create this application was the theft of customer vault backups from LastPass in late 2022. What happened to LastPass could have also happened to 1Password, Dashlane, even Proton Pass, reckons Domingo. “When your vault sits on someone else's server, you inherit every risk that server carries: employee access, infrastructure vulnerabilities, government subpoenas, supply chain attacks, and the simple mathematical reality that a server holding tens of millions of vaults is a far more attractive target than your laptop,” says the BlindLock dev on his blog.
So, three independent layers of security apply to your BlindLock vault. It is invisible in its ordinary-looking PNG carrier, not just encrypted. BlindLock doesn’t run a central vault database, so there is nothing for attackers to steal from BlindLock servers and crack later. Your resting vault file uses 256-bit authenticated encryption and already includes NIST post-quantum components. It is also bound to your device. “The vault opens only when three things match: the carrier file, your master password and your authorized device,” asserts the BlindLock app page. “A copied file alone is not enough to gain access.”
BlindLock’s feature set is pretty broad for a new offering. Fully encrypted inside your chosen .PNG holiday snap or cat photo is a password manager, Markdown-supporting secure notes, a built-in 2FA authenticator, and an encrypted file vault (for any type of file), and there is support for an optional fourth-factor security key like a YubiKey or Google Titan, etc.
Accessing your BlindLock data requires three things at once: the carrier file, your master password, and the authorized device - the vault key is sealed to that device's security chip, which is TPM 2.0, Secure Enclave, or StrongBox depending on the platform. You can avoid overly bloating your central .PNG file by squirreling larger files separately in their own encrypted containers. BlindLock employs a hidden volumes system not unlike VeraCrypt for these containers. Domingo admits these are “not magically unfindable,” but are Argon2id-hardened, 256-bit authentication-encrypted and stored inconspicuously. For device loss or migration, users must create an encrypted BlindLock backup and keep its recovery phrase separately.
As per the intro, BlindLock is being introduced as a one-time $49 purchase. This perpetual pricing plan only applies to the first 1,000 licenses. There will be three waves: “the first 100 at $49, the next 350 at $89, and the final 550 at $109. After that, BlindLock is subscription-only,” says Domingo. The independent dev wants to lay a solid financial foundation, so development of BlindLock can continue.
This article is merely sharing the news about BlindLock and shouldn't be taken as a recommendation. Please check out the online and downloadable demos and judge whether it works for you and offers the features you want for the price.
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Mark Tyson is a news editor at Tom's Hardware. He enjoys covering the full breadth of PC tech; from business and semiconductor design to products approaching the edge of reason.
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jp7189 Not sure how this is much different from steganography tricks of the past.. all of which (afaik) use some sort of pattern that can be scanned for.Reply
If tied to tpm, what's the recovery method if the tpm dies for some reason?.. and then how easy is that recovery to attack? -
Grobe Reply
well, doesn't that means the password vault is tied to that specific computer as well?jp7189 said:If tied to tpm, what's the recovery method if the tpm dies for some reason?.. and then how easy is that recovery to attack? -
USAFRet Reply
Yep.Grobe said:well, doesn't that means the password vault is tied to that specific computer as well?
"It is also bound to your device. “The vault opens only when three things match: the carrier file, your master password and your authorized device,” asserts the BlindLock app page. “A copied file alone is not enough to gain access.”" -
BlindLock Hi, I'm David, the developer and founder of BlindLock.Reply
First of all, thank you very much for the article about my software.
I was really happy to see it and thank you for welcoming me to this forum.
I'd be happy to answer all your questions and share my thoughts honestly and personally.
@jp7189, on steganography being scannable: Fair point, and I want to be precise about what the picture does and does not do. A forensic analyst who already suspects a specific file can detect that it carries hidden data. That was never the security BlindLock relies on. The picture is the first layer, and its job is different: nobody knows there is anything in it to begin with. Think of a burglar. He goes for the obvious things, jewellery, cash, the safe in the basement. The child's drawing on the fridge and the family photo are worthless to him. An attacker on a computer works the same way. He hunts for wallet seed phrases, password manager databases, browser cookies, anything he can take home and crack at leisure. One more photo among thousands is not on that list, and searching every image on a machine for hidden payloads is expensive work for a target that might not exist.
If someone does find and extract the payload, they hold ciphertext whose keys are bound to the security chip of the computer that created it, and they would still need the password. So the honest claim is not "undetectable". It is "not worth looking for, and useless once found".
On the TPM dying: That is exactly why every setup ends with a backup file and twelve recovery words that you write down. The backup file is encrypted and useless on its own. Restoring on a new machine needs that file plus the words, and then the vault is re-bound to the new machine's chip. Two independent factors, neither of which is stored on the old computer, and it is deliberately the only way to move a vault.
@Grobe and @USAFRet, tied to this computer: Yes, that is by design. Copying the picture to another computer and knowing the password is not enough to open it there. Moving to a new computer goes through the recovery path described above, not through a copy. Anything else would make the whole idea pointless: if a copy could simply be opened elsewhere, then so could a copy stolen by a RAT or similar malware, together with the password it recorded at the same time. If you are looking for a vault that opens wherever a copy lands, BlindLock is the wrong tool, and I would rather say that plainly than oversell it.