ITU-T Recommendation X.509

ITU-T Recommendation X.509 is a standard that defines how digital certificates are created and managed to securely verify identities online. Think of it like a digital passport or driver's license that confirms who someone or a device is. These certificates are issued by trusted entities called certificate authorities. X.509 certificates are fundamental to secure communications, enabling encrypted data transfer and authentication in systems like HTTPS, email security, and virtual private networks. Overall, it helps ensure that your digital interactions are private and trustworthy by providing a reliable way to verify identities electronically.