SecurSign supports any X.509 version 3 digital certificate available from almost any certificate authority; including VeriSign, Network Solutions, GoDaddy, Comodo, etc. These certificates can be purchased from the certificate authority using your standard internet browser.
Once purchased, the certificate can be exported from your browser as a standard Public Key Cryptography Standard PKCS#12 file. PKCS#12 files usually have a .p12 extension (such as my_cert.p12) or a .pfx extension (such as my_cert.pfx). PKCS #12 is the Personal Information Exchange Syntax Standard.