ZK Technology

We know ZK technology might be a new concept for many of you, so we want to explain how it works

The ELI5 version is:

Imagine you’re trying to prove to your friend that you know the password to their locked phone without actually telling them the password

A Zero-Knowledge Proof is akin to demonstrating you can open the phone, but without sharing how

There are a couple key ZK concepts.

  • Completeness: If the statement is true, a valid proof will always be able to convince a verifier

  • Soundless: A fake proof cannot trick the verifier

  • Zero Knowledge: No info is leaked other than that the statement is true or false

Here's how ZK works in Lethe

  • When you shield, top up your private balance, or send from it a ZK proof is generated that confirms a valid deposit/transfer was made

  • When you, or your recipient unshield, another ZK proof verifies that the withdrawal is legitimate and that whoever is withdrawing is allowed to access the funds—without revealing the original sender

  • This ensures the both deposits and withdrawals don't leak any details about who the person on the other side of the transaction is

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