defsec

defsec

Principal Security Researcher - Penetration Tester - OSWE - OSCE - OSCP

@defsec

39

Spearbit

sr

Public earnings

$533.04

486th


Public findings

6


Worked with

Marginal
Layer N
Tezos
Superform
Coinbase
7seas
Gerard Persoon
Jonatas Martins
zigtur
Blockdev
bahurum
Optimum

Biography

Security Researcher - OSWE - OSCE - OSCP - Ex Senior Director Of Security for Web3 Firm - Ex Sr. Security Engineer at Binance

Biography

With a solid foundation spanning over a decade in Web2 Security, defsec stands at the intersection of traditional digital security and the burgeoning world of blockchain. Over the past three years, he has pivoted to Web3 Security, distinguishing themselves as a key figure in this new frontier.

Currently serving as the Director of Security for a renowned Web3 security firm, defsec's expertise is broad and multi-faceted. His portfolio boasts collaborations with leading projects in the realms of Decentralized Finance (DeFi), blockchain bridges, and Layer 1 (L1) chains.

Adept at navigating various blockchain ecosystems, defsec has hands-on experience with a diverse range of platforms and technologies, including Cosmos, Cosmwasm, Rust, and EVM-based projects. His proficiency in these domains has not only been acknowledged by industry peers but has also contributed significantly to the security and reliability of many projects.

defsec's prowess as a security expert is further underscored by his impressive record in bug bounty hunting. Through his meticulous assessments and unparalleled attention to detail, he has successfully identified and rectified vulnerabilities that have prevented potential asset losses amounting to over 10 million.

Driven by a passion for ensuring the security and integrity of complex protocols, defsec remains eager and committed to confronting and conquering the intricate challenges posed by the rapidly evolving world of Web3.

Work Experience

  • Senior Director of Security - Halborn
  • Senior Security Engineer - Binance

Top competitions

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Contest
Position
Date
Payout
grass

grass

6

/ 204

June 2024$533

Private reviews

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Engagement
Project title
Timeframe
Researchers
Paladin

Paladin

Warden-Quests

Apr 2022 - Apr 2022

+1
Jared Jordan
defsec
Devansh Bantham
Porter Finance

Porter Finance

Porter v1-core

May 2022 - May 2022

+2
Satyam Agrawal
defsec
Brock Elmore
LI.FI

LI.FI

LI.FI Cross-Chain Aggregator Audit Summary

Sep 2022 - Sep 2022

+1
Gerard Persoon
Jonah Wu
defsec
LI.FI

LI.FI

Cross-Chain Bridge Audit for LI.FI Protocol

Mar 2023 - Mar 2023

+1
Gerard Persoon
Jonah Wu
defsec
BASE

BASE

smart-escrow

Oct 2023 - Oct 2023

+2
Christos Pap
bahurum
Anurag Jain

Security portfolio

Title
Description
Aurora Rust (Near) AuditThe Aurora environment consists of the Aurora Engine, a high-performance EVM—Ethereum Virtual Machine—and the Rainbow Bridge, facilitating the trustless transfer of ETH and ERC-20 tokens between Ethereum and Aurora, within a great user experience. This audit focused on the Fast Bridge, a one-way semi-decentralized bridge created to speed up transfers from Near to Ethereum.