The following table presents a list of Service Modules currently available within Digi-CA™.
| Component | Code | Minimum Requirements Specification |
| Cryptographic Service Provider | CSP | Certificate & CRL Generation Services |
| Time-Stamping Gateway | TSG | Digital Time-Stamping Service |
| OCSP Gateway | OCSPG | Real time Revocation Status Service |
| CA Application Service | CAAS | TSG and OCSPG gateway services connector |
| CA Management Console | CAMC | Web based Certification Authority management |
| RA Management Console | RAMC | Web based Registration Authority management |
| Entity Registration Service | EERS | Web based End Entity Registration management |
| Content Dissemination Service | CCDS | Certificate and CRL dissemination management |
| a | where it is required to centralise all Module Services on a single dedicated server to reduce costs and where large certificate volumes are not a demand; | |
| b | in a most complex environment, for very high volume certificate processing and where all Module Services are distributed separately to a number of server devices, most often in combination with network hardware load balancing, database data replication as well as hardware and software fail-over that combine to form the so called ‘High Availability’ model. | |
This unique feature of Digi-CA™software provides not only a flexible range of possible configuration variations but allows organisations to slowly build their own PKI infrastructure from a very small environment and carefully control their expenditure related to purchasing and maintenance of hardware devices.