Blockchain

Hardware Wallet

A physical device designed to keep private keys isolated while authorizing blockchain transactions.

Source: SDA editorial · reviewed 2026-09-08

Related terms

Wallet

Software or hardware that manages private keys and constructs or authorises blockchain transactions.

See it in the real numbers

🌍

Europe Live

Every term as a live figure across the European grid.

 📚

Learn

Short lessons that put the term in context.

 🟩

Griddle

Guess today's country from its live energy mix.