Explore a comprehensive review of blockchain security failures and risk mitigation strategies in this Black Hat conference talk. Delve into various wallet types, including hot, cold, online, mobile, desktop, paper, and hardware wallets, and understand their strengths and vulnerabilities. Learn about typical setups for individuals and receive recommendations for secure practices. Examine the relationship between exchanges and wallets, and investigate the concept of "warm" wallets. Analyze notable blockchain bugs and attacks, such as the Bitcoin overflow, Ethereum reentrancy, Zerocoin multi-spend, Lisk account hijack, Parity wallet bug, IOTA's hash function issues, Bitgrail withdrawals, Batch Overflow, and Verge vulnerabilities. Gain insights into BIP32 tools and their implications for blockchain security.