The purpose of a digital key in cybersecurity is to provide secure access to digital resources without the need for traditional passwords. Digital keys utilize strong encryption to authenticate users and grant permission for access, reducing the risk of unauthorized entry and fraud. They can be implemented in various forms, such as smart cards, USB tokens, or mobile applications, offering a more convenient and secure alternative to passwords. By eliminating static credentials, digital keys enhance protection against phishing attacks and provide an additional layer of security in identity management processes, ensuring data integrity and confidentiality.