You have to install ''e-sign CYPRUS Electronic Root Certificate Service Provider S1'' certificate and ''e-sign CYPRUS Qualified Electronic Certificate Service Provider'' sub root certificate to your computer in order to create and verify electronic signature.

e-sign CYPRUS embraced a certificate authority structure proper to hierarchical model. According to this structure, ''e-sign CYPRUS Electronic Root Certificate Service Provider S1'' is on top of offline hierarchical relationship.

Operations related to ECSP’s (Electronic Certificate Service Provider) running are carried out by ''e-sign CYPRUS Qualified Electronic Certificate Service Provider'' sub root certificate which is able to conduct all functions of a root certificate authority in technical way.