Crypto has never really solved identity.
Most projects either ignore it completely or force heavy KYC.
In both cases, users lose privacy.
That’s the problem.
That’s why Sign feels different.
Instead of treating identity like a side feature, it puts attestations at the center.
It combines encryption, zero-knowledge proofs, and selective sharing, so you only reveal what’s needed, nothing more.
At the core are two simple ideas:
Schemas → like reusable templates that define how data is structured
Attestations → verified pieces of information stored on-chain
Think of it like this:
A schema is a blank form.
An attestation is the filled, signed version of that form.
Simple idea, but very powerful.
And people are actually using it:
400,000+ schemas created
6.8 million+ attestations issued
That’s real adoption, not just theory.
Where it gets interesting is privacy.
With zero-knowledge proofs, you can prove things like:
You’re over 18
You live in a certain country
Without showing your actual documents.
Just proof, no exposure.
Another key feature: revocation
Credentials can be updated or removed.
Because real life changes, and your data should too.
Sign also works across different blockchains.
It uses secure environments (TEEs) and tools like Lit Protocol to verify data safely, without revealing everything.
There’s also Sign Pass, an on-chain identity system.
It lets wallets hold things like:
KYC status
Certifications
Credentials
So instead of uploading documents again and again, you just prove what’s needed instantly.
Even governments are exploring this.
Countries like Kyrgyzstan and Sierra Leone are testing digital ID systems using Sign.
The idea is simple:
One identity, reusable everywhere, public and private services, without repeating paperwork.
It even allows checking eligibility (like welfare) without exposing personal data.
Of course, it’s not perfect.
TEEs still require trust in hardware
Systems depend on proper implementation
Governments and institutions still need to accept these standards
That’s the reality.
But still, this feels like progress.
Sign isn’t about total surveillance,
and it’s not about ignoring identity either.
It’s trying to find a balance:
portable identity + real privacy
Not hype, but something worth watching.