Insights

Insights

Keycard blog tag

Articles tagged Insights

What is a hardware wallet? How it works and what to check before you trust one

Hardware wallet device used to store cryptocurrency private keys offline

The Importance of Seed Phrases Explained

on 29 Sept 2026

A handwritten crypto wallet recovery phrase on paper next to a hardware wallet smartcard

Reproducible builds in hardware wallets: why "same source, same binary" matters

Diagram showing reproducible build verification between hardware wallet source code and shipped firmware binary

Smartcard hardware wallets: how a secure element stores and signs

Smartcard hardware wallet tapped via NFC to sign a transaction using an on-card secure element chip.

Best air-gapped hardware wallets compared: QR signing, open source, and secure elements

Air gapped hardware wallet signing a transaction via QR code, keeping private keys isolated from any networked device.

Open-source Ledger alternatives compared: Keycard, Trezor, Coldcard and more

Comparison of open-source hardware wallets Keycard, Trezor, Coldcard, and BitBox02 as alternatives to Ledger.