SciPHRPlain-language security, key by key.
Short explainers on how crypto keys, custody, and recovery actually work. Written for people who want the mechanism, not the hype. Each entry answers one real question and explains the thing it names in plain words.
[ 01 ]The basics
Start anywhere.
[ A ] · Custody→
What is a seed phrase, and why is it risky?
The 12 or 24 words behind most wallets, what they actually control, and why anyone who reads them can drain the account.
[ B ] · Keys→
What is a private key in crypto?
Why a private key is closer to a physical key than a password, and why that one difference shapes almost everything about wallet security.
[ C ] · Hardware→
What is a hardware security module (HSM)?
The chip that stores keys and never lets them leave. The same idea that powers Face ID, applied to crypto custody.
[ D ] · Custody→
What is self-custody?
What it means to hold your own keys, how it differs from leaving them with an exchange, and the tradeoff people usually miss.
[ E ] · Compare→
Passkeys vs seed phrases
Why a passkey cannot be phished the way a seed phrase can, and what that means for protecting an account.