How Ledger-backed login typically works
Ledger devices enable stronger authentication because the private keys remain inside the hardware. Login patterns often combine a user credential (email or account ID) with a challenge-response signature from the device. The host generates a random challenge; the Ledger signs it using a device key and returns the signature. The server verifies the signature and, if valid, issues a short-lived session token. For high-value actions, require a fresh device confirmation rather than relying on long-lived sessions. This flow prevents remote attackers who lack physical device access from impersonating the user.
Session management
Short-lived tokens reduce risk: keep session lifetimes conservative for sensitive apps and provide easy ways to revoke active sessions (e.g., settings -> active sessions). On shared machines always sign out and, when available, enable session confirmation prompts for critical operations. Ledger Live typically requests device re-approval for signing transactions even when a session is active — that on-device check is the final authority.