--- title: Integrating ZK-Proofs and Privacy in Solidity Smart... description: Zero-knowledge proofs (zk-SNARKs) enable privacy-preserving smart contracts by allowing verification of conditions without revealing underlying data. This... canonical: https://daily.dev/posts/integrating-zk-proofs-and-privacy-in-solidity-smart-contracts-l6tejg0wj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Integrating ZK-Proofs and Privacy in Solidity Smart Contracts | daily.dev og:description: Zero-knowledge proofs (zk-SNARKs) enable privacy-preserving smart contracts by allowing verification of conditions without revealing underlying data. This... og:url: https://daily.dev/posts/integrating-zk-proofs-and-privacy-in-solidity-smart-contracts-l6tejg0wj og:image: https://api.daily.dev/og/posts/l6tEjG0wJ.png og:image:alt: Integrating ZK-Proofs and Privacy in Solidity Smart Contracts og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Integrating ZK-Proofs and Privacy in Solidity Smart Contracts **[Coins Bench](https://daily.dev/sources/coinsbench)** · 12 min read · 1 upvotes · 0 comments ## Summary Zero-knowledge proofs (zk-SNARKs) enable privacy-preserving smart contracts by allowing verification of conditions without revealing underlying data. This guide covers practical implementation using Circom circuits for proof generation and Solidity contracts for on-chain verification. Key patterns include age verification, private voting, shielded token transfers, and credit scoring. The article demonstrates circuit design fundamentals, integration workflows, zkSync Era's native privacy features, and security considerations like under-constrained circuits and proof malleability. Real-world use cases span DeFi, tokenized real-world assets, and enterprise supply chains. Includes performance benchmarks showing Groth16 verification costs around 250k-350k gas and proof generation times from 100ms to 15 seconds depending on complexity. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Zero-Knowledge Proofs \(ZKPs\): The Privacy Primitive Powering Web3](https://daily.dev/posts/zero-knowledge-proofs-zkps-the-privacy-primitive-powering-web3-znhu7ocez) · Coins Bench · 12 upvotes · 0 comments - [Enterprise Smart Contracts Have a Cryptography Problem. EY Just Built a Way Around It](https://daily.dev/posts/enterprise-smart-contracts-have-a-cryptography-problem-ey-just-built-a-way-around-it-czjjr0jyr) · DevOps.com · 0 upvotes · 0 comments - [Zero-Knowledge Proofs for Privacy-Preserving Context Validation](https://daily.dev/posts/zero-knowledge-proofs-for-privacy-preserving-context-validation-ow9k48ypx) · Security Boulevard · 0 upvotes · 0 comments - [Zero-Knowledge Compliance: How Privacy-Preserving Verification Is Transforming Regulatory Technology](https://daily.dev/posts/zero-knowledge-compliance-how-privacy-preserving-verification-is-transforming-regulatory-technology-eqcxgpbmr) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#blockchain](https://daily.dev/tags/blockchain), [#cryptography](https://daily.dev/tags/cryptography), [#ethereum](https://daily.dev/tags/ethereum), [#smart-contracts](https://daily.dev/tags/smart-contracts), [#solidity](https://daily.dev/tags/solidity) [View this post on daily.dev](https://daily.dev/posts/integrating-zk-proofs-and-privacy-in-solidity-smart-contracts-l6tejg0wj) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Integrating ZK-Proofs and Privacy in Solidity Smart Contracts","url":"https://daily.dev/posts/integrating-zk-proofs-and-privacy-in-solidity-smart-contracts-l6tejg0wj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/integrating-zk-proofs-and-privacy-in-solidity-smart-contracts-l6tejg0wj"},"datePublished":"2026-01-26T08:05:37.052Z","dateModified":"2026-01-26T08:06:04.501Z","description":"Zero-knowledge proofs (zk-SNARKs) enable privacy-preserving smart contracts by allowing verification of conditions without revealing underlying data. 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