Bitdefender Sign-in allows products online features, helps you to manage an account, sees your subscription and much more. Bitdefender Antivirus has network threat prevention. It prevents attack before they are trying to influence you. It restricts your device from being compromised in botnet attacks and blocks sensitive information from being sent in unencrypted forms. Bitdefender Login prevents the exploitation of vulnerabilities in your system and detects and blocks brute-force attempts.