World-Class Security Researchers
Meet the team behind FailSafe: PhD cryptographers, published researchers, and security experts from leading institutions including Microsoft, Google, and top universities worldwide.
Our Researchers
World-class cryptography expertise and security research guiding the future of blockchain security.
Chief Technology Officer & Co-Founder
Dr. Ari Medvinsky is FailSafe's CTO and Co-Founder, bringing over two decades of pioneering work in cryptographic systems and digital identity. With a Ph.D. in Cryptography, Dr. Medvinsky has been at the forefront of securing authentication protocols, verifiable credential systems, and privacy-preserving technologies that power modern digital infrastructure.
Key Expertise
US 9,461,989 • Issued 2016
US 9,270,700 • Issued 2016
US 9,195,810 • Issued 2015
US 9,055,107 • Issued 2015
US 8,683,549 • Issued 2014
US 8,635,635 • Issued 2014
US 8,528,058 • Issued 2013
US 7,913,084 • Issued 2011
US 7,434,253 • Issued 2008
Head Security Researcher
Sam is a world-class security researcher and penetration tester who has earned recognition as a Top 20 researcher on HackerOne, one of the world's leading bug bounty platforms. With extensive experience in offensive security and vulnerability research, Sameh has helped secure some of the world's most critical digital infrastructure by identifying and responsibly disclosing high-impact security vulnerabilities.
Key Expertise
Ranked among the top 100 security researchers globally on HackerOne platform
HackerOne
Mastered identification and exploitation of Insecure Deserialization vulnerabilities
OWASP Top 10
Expert in Cross-Site Scripting (XSS) vulnerability discovery and mitigation
OWASP Top 10
Specialized in Broken Authentication and Session Management security testing
OWASP Top 10
Contributed to securing platforms processing over $100 million in transactions
Bug Bounty Programs
Identified and reported critical security vulnerabilities in TikTok's infrastructure
TikTok Bug Bounty
Helped secure cryptocurrency exchange infrastructure and smart contracts
Coinbase Bug Bounty
Discovered vulnerabilities in DevOps platform and CI/CD pipeline security
GitLab Bug Bounty
Secured employment platform and protected sensitive user data
Glassdoor Bug Bounty
Contributed to securing LINE messaging platform and associated services
LY Corporation Bug Bounty
Identified vulnerabilities in travel booking platform and payment systems
Expedia Bug Bounty
Senior Security Researcher
ret2basic is a multi-chain security researcher with expertise across six blockchain ecosystems: EVM, Move (Aptos and Sui), Solana, Cosmos SDK, CosmWasm, and TON. He has contributed to critical infrastructure audits with Sigma Prime, including Taiko's ZK rollup bridge, SGX proofs, and Reth's Rust Ethereum implementation.
Key Expertise
Discovered 23 Critical, 67 High, and 100 Medium severity vulnerabilities across 36+ security audits
Career Statistics
Won first place in competitive security audit contest for Uniswap V2 fork on Sui
HackenProof
Achieved third place in Code4rena audit competition, finding 1 High severity issue
Code4rena
Found 3 Critical, 5 High, 7 Medium severity issues in Ethereum-equivalent ZK Rollup bridge and SGX proofs
Sigma Prime
Discovered 4 Critical, 6 High, 8 Medium severity issues in Rust Ethereum implementation
Sigma Prime
Identified 2 Critical, 1 High, 4 Medium severity issues in LayerZero integration
FailSafe
Audited Tornado Cash-like privacy protocol with Solidity + Circom ZK circuits
ZK Security
Completed audits across 6 blockchain ecosystems: EVM, Move, Solana, Rust, FunC, and ZK Circuits
Cross-Chain
Senior Security Researcher
JesJupyter is a competitive smart contract auditor with a consistent record of top placements across leading platforms including Cantina, Code4rena, Sherlock, and CodeHawks. Achievements include first place finishes on Arcadexyz (19 competitors) and Coinbase SpendPermission, second place on Usual Pegasus and BadgerDAO, and third place on Royco Protocol (109 competitors).
Key Expertise
Discovered 91 verified vulnerabilities across multiple high-value DeFi protocols, ranked 82nd globally
Cantina
Won first place among 19 competitors in February 2024
Cantina
Won first place among 6 competitors in October 2024
Cantina
Achieved silver medal placements on Cantina (Usual Pegasus) and Code4rena (Badger)
Cantina / Code4rena
Ranked 3rd among 109 competitors in September 2024
Cantina
Discovered 13 high-severity and 25 medium-severity vulnerabilities across 15 Code4rena audits
Code4rena
Found 6 High and 3 Medium severity issues in NFT gaming platform including critical fighter transfer bugs
Code4rena
Identified 1 High and 5 Medium severity issues including critical price manipulation vulnerability
Code4rena
Our Expertise
Deep domain knowledge across cryptography, smart contracts, AI security, and infrastructure protection.
Cryptography & Protocol Design
Deep expertise in verifiable credentials, zero-knowledge proofs, authentication protocols, and privacy-preserving cryptography.
Key Highlights
Smart Contract Security
Comprehensive auditing experience across EVM, Solana, Move, and other blockchain platforms.
Key Highlights
AI & Machine Learning Security
Specialized in LLM security, prompt injection, model poisoning, and adversarial ML attacks.
Key Highlights
Penetration Testing
Real-world attack simulation and infrastructure security testing across web, mobile, and blockchain systems.
Key Highlights
Research & Thought Leadership
Our team actively contributes to the security research community through publications, conference talks, and open-source contributions.
Research on quantum threats, authentication protocols, and cryptographic systems
Innovations in authentication, credential management, and security protocols
Kerberos cipher suites for TLS - foundational internet security standard
Work With Our Team
Get expert security guidance from our world-class team of researchers and practitioners.