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Deadhand – trustless Bitcoin inheritance in 2 minutes

by maxcomperatore·Feb 26, 2026·1 point·0 comments

AI Analysis

●●●BangerZero to OneBig BrainBold Bet

Trustless dead man's switch for Bitcoin via Shamir SSS, but execution risk and regulatory uncertainty loom.

Strengths
  • Genuine zero-knowledge architecture: seed encryption in browser, service never sees plaintext
  • Shamir's Secret Sharing is mathematically sound and audited; heartbeat trigger is clever
  • 2-minute setup and $0 cost vs $500–$5k lawyer fees addresses real pain
Weaknesses
  • Heartbeat reliability (email check-ins) is operational risk; service outage blocks inheritance permanently
  • Regulatory status unclear: 90-day forced fund transfer may violate probate or AML laws in some jurisdictions
Category
Target Audience

Bitcoin holders wanting trustless estate planning without lawyers or custodians

Similar To

Casa Wallet · Unchained Capital · Coinbase Vault

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GPU-accelerated search for Bitcoin keys generated with weak entropy

This reads like a GPU engineer's field notes — one ~3,400-line CUDA file implements a full per-thread crypto pipeline (key gen → EC multiply → SHA-256 → RIPEMD-160) and a two-stage bloom+binary-search matcher to check ~3,100 targets at ~100M keys per batch. The article digs into concrete low-level choices (LUT layout, memory hierarchy, __ldg reads, atomicCAS reporting, and per-mode keygen strategies), which is rare in public writeups; downside is it's closed-source and the dual-use/ethical implications should be called out more explicitly.

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