Notakey by Notakey is a multi-factor authentication and identity management solution. It provides strong authentication for bank login and transaction approval, meeting regulatory requirements such as PSD2, eIDAS, and GDPR. Notakey offers both on-premise and SaaS deployment options, supporting unlimited user sources including Active Directory, LDAP, and Radius. The system utilizes smartphone-based authentication, public-key cryptography, and flexible security policies to replace password-based workflows.