Growing ubiquity and safety relevance of embedded systems strengthen the need to protect their functionality against malicious\r\nattacks. Communication and system authentication by digital signature schemes is a major issue in securing such systems.\r\nThis contribution presents a complete ECDSA signature processing system over prime fields for bit lengths of up to 256 on\r\nreconfigurable hardware. By using dedicated hardware implementation, the performance can be improved by up to two orders\r\nof magnitude compared to microcontroller implementations. The flexible system is tailored to serve as an autonomous subsystem\r\nproviding authentication transparent for any application. Integration into a vehicle-to-vehicle communication system is shown as\r\nan application example.
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