Disig operates several certification authorities:

• the largest Slovak certification authority CA Disig,
• SVK eID ACA, SVK eID PCA and SVK eID SCA certification authorities for the purpose of issuing certificates and qualified certificates to national eID cards,
• Root and Subordinate Certification Authorities Included in Trusted Root Certification Authorities from Microsoft, Mozilla, Google, Apple

Disig is a member of CA/Browser Forum for standardizing requirements for issuing publicly trusted TLS / SSL certificates.