certum

Certum is a term with both a linguistic and a modern branding sense. In Latin, certum is the neuter singular form of the adjective certus, meaning certain, sure, or fixed. It can function as an adjective or as a substantive, appearing in phrases such as id certum est, “that is certain.” The masculine and feminine forms are certus and certa, with certum used for neuter nouns or when the concept is referenced in a general, abstract way.

In contemporary use, Certum is best known as a brand name for a Polish digital certificate authority. It operates within the Unizeto Technologies group and provides a range of security and identity services, including SSL/TLS certificates, code signing certificates, and personal and organizational digital certificates. Certum supports electronic signatures and authentication solutions for individuals, businesses, and public sector entities. Under the European Union eIDAS regulation, Certum is recognized as a Qualified Trust Service Provider that issues qualified certificates for electronic signatures and seals, making it a staple in Poland’s digital infrastructure and in cross-border electronic transactions within the EU. The dual existence of the term—an ancient Latin word and a modern cybersecurity brand—reflects its broad historical and contemporary relevance.