"Two-way authentication," commonly referred to as two-factor authentication (2FA), adds an essential layer to online security by requiring users to provide two forms of verification before accessing accounts. Typically, this involves something the user knows (like a password) and something the user possesses (such as a mobile device or security token). By implementing 2FA, organizations significantly reduce the risk of unauthorized access, preventing potential breaches and safeguarding sensitive information. This makes accounts much harder to compromise, even if passwords are stolen.