Hiroshi Tanaka
Security & On-Chain Forensics
Tokyo5 articles
Hiroshi investigates exchange breaches, protocol exploits and laundering flows using on-chain forensic tooling.
hiroshi@cryptoxinsights.comAreas covered
- Exchange breaches
- Protocol exploits
- On-chain forensics
- Laundering flows
Published under: Security.
How they work
Hiroshi traces stolen funds address by address and publishes the transaction hashes so readers can follow the same trail.
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Articles by Hiroshi Tanaka
State-linked laundering flows draw fresh enforcement attention
Investigators report that laundering pipelines linked to sanctioned actors have shortened conversion times and increased cross-chain hops, while remaining traceable at the off-ramp.
Cross-chain bridge exploit revives the case against custodial message passing
A cross-chain bridge lost a substantial sum to a compromise of its validator set, repeating a failure pattern documented in most major bridge incidents of the past five years.
DeFi lender drained in oracle exploit, about $120 million at risk
A large on-chain lending protocol was drained for roughly $120 million in a July 2026 oracle-manipulation exploit, underscoring persistent smart-contract risk even as DeFi TVL climbs to multi-year highs.
Coinbase discloses insider-led data breach affecting at least 69,000 customers
Coinbase revealed that criminals bribed overseas support staff to steal customer data, refused a $20 million ransom, and warned remediation could cost up to $400 million.
Bybit suffers a record $1.5 billion hack blamed on North Korea's Lazarus Group
In February 2025 Bybit lost nearly $1.5 billion of Ethereum in the largest crypto heist on record. Investigators tied it to a breached Safe{Wallet} developer machine, and the FBI blamed North Korea's Lazarus Group.