This section examines the security and privacy foundations of the [[ZKP/Data Marketplace/Intro|Data Marketplace]], focusing on [[ZKP/Data Marketplace/Technical Basis/Cryptographic Foundations/Mathematical Foundations|established cryptographic]] mechanisms and [[ZKP/Data Marketplace/Security and Privacy/Threat Model and Key Protections|their implementation]] in the decentralized data economy. ## Cryptographic Security Foundations The Data Marketplace builds directly upon the ZKP Blockchain's cryptographic infrastructure, leveraging [[ZKP/Data Marketplace/Technical Basis/Cryptographic Foundations/Lifecycle of zk-SNARKs|zk-SNARKs]] for [[ZKP/ZKP Base Layer/ZKP Blockchain/Technical Build Application Layer/Privacy-Preserving Computations with ZK Wrappers/Privacy-Preserving Computations with ZK Wrappers|privacy-preserving operations]] through both EVM pallet and native verification mechanisms [77]. These [[ZKP/ZKP Base Layer/Core Concepts/Zero-Knowledge Proofs|zero-knowledge proofs enable]] critical marketplace functions like [[ZKP/Data Marketplace/Tokenized Datasets/Tiered Access Control|access control verification]] and [[ZKP/Data Marketplace/Tokenized Datasets/Encryption and ZKP Ownership Verification|dataset attribute validation]] without exposing sensitive information. The marketplace's implementation aligns with the base layer's security parameters, including the BLS12-381 elliptic curve for zk-SNARKs, which targets 128-bit security against classical attacks based on the discrete logarithm problem [88, 98]. However, zk-SNARKs require a trusted setup, where a Common Reference String (CRS) is generated through a multi-party computation (MPC) ceremony involving 20 participants, achieving a collusion risk below 2^(-128) [89]. To [[ZKP/ZKP Base Layer/ZKP Blockchain/Cryptographic Assumptions and Implementation Risks/Trusted Setups for zk-SNARKs|mitigate risks associated with the trusted setup]], we have implemented a transparent audit trail of the MPC ceremony, publicly logging participant contributions and destruction proofs in immutable storage for perpetual verification. Additionally, we are pursuing a phased migration to [[ZKP/ZKP Base Layer/Core Concepts/zk-STARKs/zk-STARKs|zk-STARKs]] for high-sensitivity operations (e.g., [[ZKP/Data Marketplace/Decentralized Governance/Decentralized Governance via Data DAOs|governance voting]], compliance verification), which eliminate the need for a trusted setup while offering post-quantum security, albeit with larger proof sizes. This migration will begin with a pilot integration in the next testnet phase, targeting full deployment for sensitive functions within 18 months, ensuring a trustless architecture consistent with blockchain principles. Long-term security planning includes ongoing evaluation of emerging cryptographic threats and potential transitions to post-quantum secure alternatives as needed. See also: [[ZKP/Data Marketplace/Security and Privacy/Threat Model and Key Protections|Threat Model and Key Protections]]