Danske Bank Group PKI Service is a service for customers who make and manage certificates used to communicate with the bank through Web Services. Customers will be able to create, renew and revoke own certificates and fetch various information about them.
The zip-file PKI Service Documentation for Danske Bank Group is a detailed description of what the service offers and how to implement it.
The other zip-file contains the Danske Bank root certificate. The zip-file is signed by the banks VeriSign (Symantec) certificate. The root certificate can be used by 3rd-party software to verify other bank certificates.
Authenticity of the banks VeriSign (Symantec) certificate can be checked for example by using jarsigner. To be able to run jarsigner it is necessary to have Java JDK installed. Access jarsigner through the command prompt and either go to the dirctory where jarsigner is installed or if already set up as a windows path, just run the program from any location. Decription and help to use jarsigner can be found at oracle.com