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KinSwitch now connects to Claude. Ask it to draft notes and notebooks for you, everything stays encrypted at rest, and Claude only has access during sessions you start and can revoke.

A plain-English walkthrough of Shamir's Secret Sharing, the polynomial trick, where it works in production, and the brutal failure modes that make it the wrong tool for most family inheritance plans.

From Westinghouse's 1872 train brake to the Soviet Dead Hand system to WikiLeaks insurance files to modern crypto inheritance, the long, strange history of the switch that fires when you stop showing up.

The threat model, the wrapped master key architecture, the per-file content keys, the per-share keys, and the trigger pipeline, a transparent walkthrough of KinSwitch's original zero-knowledge design, preserved as history. We retired this architecture in 2026.

Your Bitcoin has an inheritance problem. Your NFTs, DeFi positions, and Web3 identities have a worse one. Here's what actually lives on-chain, what dies with the wallet, and how to build an inheritance plan that works for all of it.

Email attachments, shared drives, and fax machines aren't secure enough for your most sensitive legal documents. Here's how encrypted storage with controlled, automatic delivery keeps attorney-client documents private.

You keep seeing 'zero-knowledge encryption' on security products. Here's what it actually means, how it works, why it matters for your most sensitive documents, and the one tradeoff nobody warns you about.

Zero-knowledge services like 1Password and Bitwarden cannot reset your password. If you lose your keys, your data is gone. You can build a safety net by storing recovery codes in a KinSwitch deadman switch addressed to yourself with a shorter check-in than your family switches. KinSwitch itself moved away from zero-knowledge in 2026 and now supports password reset, with the vault encrypted.

Billions in crypto is lost forever because holders die without sharing their keys. This guide covers five methods for passing Bitcoin and other crypto to your family, from direct key sharing to encrypted deadman switches.

A deadman switch triggers automatically when you stop checking in, no lawyers, no probate, no delays. Learn how digital deadman switches work, who uses them, and how to set one up for your own digital estate planning.