One mark for everything you prove.
Renting a home, hiring someone, signing for your child, joining a gym. Each time, someone needs to know something about you, and until now the only way to prove it was to hand over a copy of yourself. SigWave gives you one mark instead. You answer only what is asked, and nobody keeps a copy of you.
Made on your phone. What signs for you never leaves your devices.
There is no account to break into and no copy of your ID on a server that could leak. What signs for you stays on your own devices. sigwave.id has no place for your birth date, your address or a document.
An answer, not your data.
Most questions have a yes or a no. Over 18? Yes. Your birth date, your license number and your address stay with you.
What you sign, anyone can check.
A page you sign carries your mark. Hold a phone over it and it says which mark signed, and whether a word has changed since.
One kind of mark. A whole town's worth of jobs.
Alder Falls is made up, and so are its people and its papers. They are samples. A page signed with a mark prints like any other page, and a phone held over it answers. Live means it works in SigWave today: at sigwave.id for anyone, and in the iPhone app, which is in testing with a small group. Built in Synap means it works today in Synap, Synaping's personal knowledge system, a separate product from the same company. In development means we are working on it now.
Priya rents an apartment.
Her new landlord needs to know she is an adult, that she holds a valid photo ID, and that she paid her last rent on time. That used to mean a photocopy of her license left in a filing cabinet, and a reference letter anyone could have edited.
Grace lets an electrician in.
His business card carries his mark. Before Tomas opens her wall, Grace holds her phone over it and asks one thing: does he hold a current electrician's license? His phone answers. When the job is done his invoice carries the same mark, so whoever owns the house next can check which mark stands behind the work.
Asha's field trip.
Priya signs the permission slip, and the school holds a phone over it: every line is as she signed it. At the museum Priya is a chaperone. Staff scan her badge, which carries the same mark, and ask whether she is over 18 and holds a valid photo ID. Her license stays in her pocket.
Biscuit goes to daycare.
The dog daycare needs proof of vaccination. The record from Cedar Hollow Animal Clinic carries the mark it was signed with, so the daycare can check that nothing changed. Checking that the mark belongs to the clinic is in development. Today the record's mark reads Calls itself, like anyone's.
Lena takes on a client.
Lena and the bakery agree on a fee, a schedule and who owns the finished designs. The agreement carries her mark. If anyone later changes a number on the page, a phone held over it says Changed. and shows the line.
Jordan joins a climbing gym.
At the front desk the gym scans Jordan's member card and asks one thing: over 18? Jordan answers and signs the release with the same mark. No driver's license photocopied, no birth date sitting in the gym's files for the next breach.
Made by hand, and provably so.
Mara's mugs carry a tag she signed, so a buyer, or whoever buys it from them years later, can check the tag is one she signed. At the farm stand, Wes signs the receipt. Neither of them needed an account with anyone to do it.
Priya links a new laptop.
Priya keeps her notes in Synap, which is separate from SigWave. On Sunday she links a new laptop to her account, and before Synap lets it approve anything, it wants to be sure it was her. Synap shows a short code on its own screen and asks her through SigWave, the same way any other company would: was this you? She checks that the code on her phone matches the one on Synap's screen, and confirms with Face ID. So far this has been used by our founder, on a test version of the app.
One mark, everywhere else you prove something.
Everything above runs today, in SigWave or in Synap, with the limits each scene notes. These use the same mark and the same rule, and answer only what is asked. We are already building most of these, and we have confirmed that every one is technically feasible under our patent-pending design.
See every use and where each one stands
Pay without a card number.
The shop gets this amount, this once. There is no number to steal, so a breached store holds nothing that works.
Know who is calling.
A call that claims to be your bank either carries the bank's mark or it does not. A fake voice has nothing to show.
No password to leak.
Sign in to a site with your mark. The site learns it is you, and not your email, your birth date or anything else. The confirm it builds on is live in SigWave, and Synap already uses it to approve a new device.
A doctor sees what the visit needs.
The history that matters, for as long as the care lasts. The permission ends on its own instead of living forever in a file. Sharing a chosen part of a record and taking it back already runs in Synap. The care provider side is in development, and SigWave marks join it next.
Ask your prescription a question.
Scan the mark on the bottle and ask about this prescription. The answer comes from the prescribing office's own AI agent, signed with the office's mark, so you know it is theirs. Anything urgent goes to the doctor. It answers questions about this prescription and routes the rest. It never diagnoses.
Eligible, without a file on you.
Prove you may vote or receive a benefit without building a record of your life to do it.
Show a business is who it says.
Today a business's mark reads "Calls itself" like anyone's. Tying it to places the business is already listed, such as its own website, is designed and in development.