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.