Bitcoin Core Wallet.dat _hot_ Jun 2026

Losing a hard drive is stressful. Losing a hard drive without a backup of wallet.dat is financially devastating. Take 10 minutes today to secure that file—your future self will thank you.

All Bitcoin addresses you have generated. Bitcoin Core Wallet.dat

This 2023 study explores the practical implementation of cryptographic algorithms used in the Bitcoin Core wallet and uncovers critical architectural vulnerabilities: Losing a hard drive is stressful

An unencrypted wallet.dat is a plain text file waiting to be read. If a hacker gets it, they can sweep your funds instantly. All Bitcoin addresses you have generated

: A pre-generated set of future addresses (default is 100) to ensure backups remain valid even if you create a few new addresses before your next backup. Default File Locations

Because this file contains your private keys, losing it—or having it stolen—is equivalent to losing physical cash. Wallet Backup and Recovery - Bitcoin Core - Mintlify