SAM Cards@Watchdata


The biggest advantage of smart cards is the application of high security reflected in two-card authentication mechanism. To meet the requirement for secure authentication, Watchdata promoted TimeCOS® PSAM card, usually inserted in a finance or transportation terminal as a secure authentication card. Shaped as a small card, it saves the main keys, authenticates user card´s validity and ensures the security of the payment. Specially designed for the fast access and payment transaction application, it has tapped into mass transit and many other fields.


ESAM is widely used as a secure data carrier in the financial, telecommunications, transportation and other areas. ESAM embedded security control module, using a dedicated smart card chip module package (DIP or COB) form, uses Watchdata´s proprietary operating system TimeCOS® embedded security. It also features anti-detection, anti-attack, self-destruction and other data protection characteristics.

Each ESAM has a unique serial number, which enables it to be the only identifier of equipment, which not only saves the keys and related data, but also fulfills functions including encryption/decryption, bi-directional authentication, visit access control, communication route protection and temporary key export through algorithms inside. Customized software could also be put and operate independently inside the ESAM chip. So far, Watchdata ESAM has been widely used in smart equipment that needs encryption or authentication.