Password Managers and Account Security Cheat Sheet

Password managers are encrypted vaults that generate, store, and autofill unique credentials for every account — eliminating the human memory bottleneck that leads to password reuse. The field matters because 77% of breaches involve stolen credentials, and a single strong master password protecting a vault of randomly generated unique passwords dramatically shrinks the attack surface. The key mental model: a password manager is not just a convenience tool but a security architecture decision — the vault's encryption, key derivation function, and zero-knowledge design determine how safe your data remains even if the provider's servers are compromised. As passkeys gain adoption, the role of password managers is evolving from credential storage to unified identity vaults that handle both legacy passwords and cryptographic passkeys.