BlockWill stores your wish, but BlockWill cannot read it. BlockWill holds your documents, but BlockWill cannot open them alone. BlockWill keeps your instructions permanent, but BlockWill cannot secretly change them. This is what zero-knowledge inheritance means, and it is the foundation that everything else at BlockWill is built on.
Most online vault services operate like a filing cabinet with a very big lock. Their security promise is that they will guard the cabinet carefully. The problem is that the people guarding the cabinet also hold the key. If they get hacked, the cabinet opens. If an employee goes rogue, the cabinet opens. If a court orders them to unlock it, the cabinet opens.
BlockWill does not work like that. BlockWill is built so that the people running BlockWill cannot open the cabinet, even if they wanted to, even if they were forced to, even if the company itself was broken into. Your wish is locked before it ever reaches us, kept locked while we store it, and unlocked only when the exact people you named, under the exact conditions you set, combine what they have.
This post is the map for how that actually works. We will explain it the way you would explain it to a ten year old, then go one layer deeper for readers who want to understand the engineering behind it. Over the next four posts in this series, we will zoom into each of the four pieces in detail. This one is the overview.
The four promises, in plain language
Every BlockWill vault carries four guarantees, and every guarantee maps to a specific engineering decision. Before we explain the engineering, it helps to see the promises together.
Promise 1. BlockWill cannot read your wish. The document is locked on your device, not ours. The key to unlock it never leaves you.
Promise 2. No single person can open your wish, not even us. The vault carries multiple locks, one tied to each guardian you name. No one guardian, acting alone, can open anything.
Promise 3. Your wish cannot be secretly changed. Every version of your wish leaves a fingerprint on a public record. If one letter of your wish moves, the fingerprint stops matching.
Promise 4. Your wish releases itself at the right moment, not before. The unlocking is not done by a person deciding. It is done by a system watching for the conditions you set, confirming them, then executing the handover automatically.
Read those four promises out loud. That is the entire system. Everything else, the cryptography, the storage, the blockchain, the triggers, exists to make those four sentences true in the real world.
A ten year old's version
Imagine you have a treasure, and you want to keep it safe for the people you love.
You put the treasure inside a box with a very strong lock. You do not give the key to the bank, because banks get robbed. You do not give the key to one friend, because friends lose keys. You do not give it to a lawyer, because lawyers retire.
Instead, you do something clever. You put several locks on the box, not just one. You give a different key to a different person you trust, your sister, your best friend, your accountant. Alone, each key opens nothing. Nobody can open the box by themselves. Not even you, after you have handed the keys out. But when enough of the trusted people bring their keys and turn them together, the box opens.
Now there is one more problem. How do the people you love know the box has not been swapped out for a different box while nobody was looking? How do they know the wish inside is the real wish you wrote, and not a fake someone slipped in?
So you do one more clever thing. You take a picture of the box, a very special picture, one where even the smallest scratch on the box would show up. You nail that picture to a giant, public wall in the town square. Thousands of people walk past that wall every day. Nobody can take the picture down. Nobody can change it. Years later, when the box is opened, anyone can walk up to the wall, look at the picture, and check that the box is exactly the same box you sealed all those years ago.
Finally, you write a rule for when the box should be opened. Not a person. A rule. The rule says: if I stop answering for long enough, or if the people I chose as my guardians confirm something has happened, or if a specific date arrives, then the box opens. The rule does not forget. The rule cannot be bribed. The rule simply watches, and when the conditions are met, it acts.
That is BlockWill.
Now, one layer deeper
The treasure is your wish. The box is your vault. The lock is encryption. The multiple locks and the guardian keys are how access is distributed across your guardians. The public wall is the blockchain. The rule that watches is what we call the release logic.
Here is how each piece actually works, in order, without getting technical.
The lock: encryption done before the wish leaves your device
When you write your wish inside BlockWill, your computer or phone locks it before anything is sent to our servers. The lock is built on your device, using a key that only you control. By the time the data reaches us, it is already unreadable.
This is sometimes called client-side encryption, and it is a very different arrangement from what most services do. Most services encrypt your data on their servers, which means they hold the key. We do not. We never did. If you walked up to our data center tomorrow and copied every hard drive, you would walk away with a pile of locked boxes and no way to open them.
This solves the most dangerous class of problem in online services, the inside job. A rogue employee cannot peek at your wish because a rogue employee does not have the key. A hacker cannot steal your wish because even if they get the stored data, the stored data is locked. A court cannot force us to reveal your wish because we cannot reveal what we cannot read.
We will cover this in depth in the next post in this series.
The guardians: no single person holds the power to open
Locking the wish is only half the problem. The other half is: when the time comes, who unlocks it?
If the answer is "you alone," then your wish is inaccessible the moment you cannot use it. That is the whole point of having a wish in the first place, it must work when you cannot.
If the answer is "BlockWill," then we are right back where every other service lives, holding the power to read everything.
If the answer is "a single guardian," then that guardian becomes a single point of failure. They could be pressured. They could be lost. They could act alone, in bad faith.
BlockWill's answer is that the vault carries multiple locks, one tied to each guardian you name. Each guardian holds their own key. When the time comes, enough of those guardians must come together and present their keys. No guardian alone can open the vault. Not even us. We hold the locked vault, but not a single one of the keys that open it.
BlockWill also goes a step further. Having enough guardian keys is necessary, but it is not sufficient. The system also verifies that every key presented is genuinely that guardian's, unaltered and uncopied. If a guardian produced a fake, or if a key were tampered with between the moment it was issued and the moment it was used, the system would detect it, and the vault would refuse to open. Every unlock is both quorum-checked and integrity-checked.
That second check is the difference between a vault that trusts the guardians blindly and a vault that trusts but verifies. It is what lets BlockWill protect your wish not just from outsiders, but from any single bad actor inside your own circle. We will cover this in depth in a later post.
The public wall: a fingerprint of your wish, not your wish itself
We said the blockchain acts as a public wall. It is worth being precise about what is on that wall and what is not.
Your wish is not on the blockchain. Your documents are not on the blockchain. Your assets, your beneficiaries, your instructions, none of that is on any public record.
What is on the blockchain is a fingerprint. Every time you finalize a version of your wish, BlockWill generates a tiny code that uniquely corresponds to that exact version of that exact document. Change one word, one comma, one character in the document, and the fingerprint changes entirely. That fingerprint, and only the fingerprint, is recorded on a public, permanent ledger.
Later, when your family or executor receives the unlocked wish, they can run the same check. They take the wish they were handed, generate its fingerprint, and compare it to the one on the public wall. If the fingerprints match, the wish is authentic, unaltered, and unambiguously yours. If they do not match, something was changed, and everyone will know.
This is how BlockWill makes your intent tamper-evident without putting any of your private information in a public place.
The release: a rule, not a person
The last piece is the one most people ask about. How does the vault actually open when the time comes?
BlockWill does not have a person behind a desk deciding when your family gets access. It has a rule you set, and a system that watches for the conditions of that rule.
You choose the conditions when you set up your vault. You can designate guardians who, together, can attest that something has happened to you. You can set a silence trigger, if you do not respond to BlockWill's check-ins for a defined period, the release process begins. You can set a fixed date, a final failsafe, so that even in the most extreme scenarios, your family is not locked out forever.
When any of those conditions is met, the system begins the release. The locked vault, the guardian keys, the fingerprint on the public wall, all of it comes together, exactly as you designed it, exactly when you intended it.
No one person decides. No one person can be bribed or coerced into triggering early or blocking a legitimate release. The rule is the rule, and the rule runs on math, not on memory.
Why this is different from every other online will service
Most online will services are, at their core, a filing cabinet with their company's name on the lock. They store your wish. They protect it as best they can. They trust their employees, their contractors, their infrastructure providers. When they say "your data is secure," they mean "we are doing our best to keep it secure."
BlockWill is a different shape. BlockWill is built so that you do not need to trust us. We are not the lock, we are not the key, we are not the decider. We are the vault, the ledger, and the mechanism. The power to read your wish lives with you while you are alive, and with your people after you are not.
A wish should outlive the company that stores it. BlockWill is designed to make that true.
What this means for the people you love
If something happens to you tomorrow, your family should not be starting a detective story.
They should not be guessing which exchange holds your crypto, which drawer holds your seed phrase, which email inbox received the most recent statement. They should not be waiting eighteen months for probate to release assets that are depreciating every day. They should not be wondering which version of your wish is the real one, or whether someone altered it after you signed it.
Zero-knowledge inheritance is BlockWill's answer to that.
Your wish is secured before it ever reaches us, locked behind guardians you chose, verified by a public record nobody can tamper with, and released by conditions only you defined. When it opens, your family gets clarity. Not clues. Not guesses. Clarity.
What comes next in this series
This post has been the map. Over the next four weeks, we will zoom into each piece of the system in its own post.
Next week, the locked box. What client-side encryption actually is, why it matters that BlockWill's servers never hold your key, and how this single decision eliminates an entire class of risks that other services quietly carry.
Week three, the guardian lock. How BlockWill distributes access across the people you trust, why "enough of them together" is the right model, and how every guardian key is not just counted but verified, so that a single bad actor inside your circle cannot force open your vault.
Week four, the public notary. How BlockWill uses blockchain to prove your wish has not been changed, without ever putting your wish, or any part of it, on any public record.
Week five, the release. How a BlockWill vault unlocks itself at exactly the right moment, the triggers you can configure, and the failsafes that make sure your family is never locked out.
Each post will stand alone, and each will link back here, to the map.
Frequently asked questions
Does BlockWill ever see my wish?
No. Your wish is locked on your device before any of it reaches BlockWill. The key required to unlock it never leaves your control. When the data arrives on our servers, it is already encrypted, and BlockWill has no means to decrypt it.
If BlockWill goes out of business, what happens to my wish?
Your wish is locked behind guardian keys held only by the guardians you named, not by BlockWill. Because the blockchain record of your wish's fingerprint is on a permanent public ledger, and because your guardians can still come together to unlock it, your wish's security is not tied to BlockWill's continued existence.
Can a court force BlockWill to hand over my wish?
A court can force BlockWill to hand over the data we store, and we would comply with any lawful order. What a court cannot do is force us to produce something we do not have. The key to decrypt your wish is not ours. A court order would result in encrypted data with no usable information.
Is my wish stored on the blockchain?
No. Only a fingerprint of each version of your wish, a short code that changes completely if the wish changes, is written to the blockchain. The wish itself, along with all personal details, beneficiaries, and instructions, stays encrypted in BlockWill's storage and is never placed on any public record.
What if one of my guardians loses their key?
BlockWill's design allows the vault to be unlocked when any sufficient number of your guardians is available, so losing a single guardian's key does not prevent release. You choose the number of guardians and the number required to come together, and you can update your guardian configuration at any time while you are active.
How is this different from storing my wish in a password manager?
A password manager protects one person's access. Inheritance requires controlled access for someone other than you, under specific conditions, potentially years in the future, without compromising security in the meantime. Password managers are not designed for that problem. BlockWill is.
Does "zero-knowledge" mean BlockWill uses zero-knowledge proofs?
Zero-knowledge is used in two related senses in the cryptography world. At BlockWill, it refers to an architecture in which the service provider has no knowledge of the contents it stores for its users, the provider cannot read, decrypt, or reveal the data, even to itself. Zero-knowledge proofs are a specific cryptographic technique that can be used inside such an architecture. The important promise, from a user's perspective, is the one BlockWill makes: we do not see your wish.
How do I get started with BlockWill?
BlockWill is live. You can book a demo from the BlockWill homepage to see the product in action, walk through the vault setup, and get a full look at the guardian configuration and release controls described in this series.
