Method for a secure data transmission

摘要: The invention relates to a method for secure data transmission, particularly between tachograph (51) in commercial vehicle and memory cards (50), where first subscriber (T1) has (6, 22) with entries (31-35) comprising identifiers (4) security certificates (Cert) from second subscribers (T2). Methods transmission are becoming increasingly important frequently associated high level of computation complexity. For this reason, the object is reduce time without losses. It proposed that fetch an identifier (T2) compare it stored (4). If matches, certificate basis subsequent if does not match then verification performed.