ZK-Proof

Zero-Knowledge Proof.

Educational content only. This page does not provide investment, legal, or regulatory advice.

Why it matters

ZK-Proof matters because it affects financial interpretation, product decisions, and industry communication.

ZK-Proof is commonly explained through its core definition and the practical example used in the glossary.

A common mistake is to use ZK-Proof without understanding its operational and regulatory context.

ZK-Proof may vary across payment rails, regulations, and market practices.

3D Secure

Security protocol for online cards.

Account Abstraction

Smart contracts as wallets.

Account Updater

A service that refreshes expired or reissued card details for recurring billing merchants.

Acquirer

Bank processing payments for merchant.

Algorithmic Trading

Trading using automated algorithms.

API

Application Programming Interface.

Stripe

Stripe: Payment tokenization 101

Used for payment tokenization, network token, and account updater context.

Stripe

Stripe: Merchant of record

Primary source for merchant-of-record terminology.

Stripe

Stripe: What is a payment facilitator?

Primary source for payfac models and platform payments.

Author

Founder and multilingual fintech glossary editor

Reviewer

Editorial and source review layer

Reviewed

3/15/2026