SeaCat PKI by TeskaLabs is a modern Public Key Infrastructure (PKI) solution designed for mobile applications, IoT devices, C-ITS (Cooperative Intelligent Transport Systems), and C-V2X (Cellular Vehicle-to-Everything) security. It provides enrollment, access, and identity management capabilities as part of the SeaCat cyber-security platform. SeaCat PKI includes security functions such as Root Certificate Authority, Enrolment Authority, Authorization Authority, and Trust List Manager. The product is compliant with ETSI standards TS 103 097 v1.3.1/v1.2.1 and ETSI TS 102 941 v1.3.1, and has been certified for ETSI Plugtests participation. SeaCat PKI has been implemented in the C-Roads pilot deployment in the Czech Republic and Slovenia.