Digi-CA™ WPKI

This Certificate Authority [CA] & Public Key Infrastructure [PKI] solution helps the mobile operator, and service provider, leverage the mobile phone SIM cards into the area of identity and digital signatures. Using Digi-CA™ Wireless Public Key Infrastructure [WPKI], turns the mobile handset into an identity token and a digital signature device that can be used with a host of mobile applications.

• Legally accepted identity information & secure transaction capability using the SIM card

• Real-world identity to third parties without requiring face-to-face confirmation

The Digi-CA™ WPKI system can be delivered as a Managed CA [1] service or as an installed Software CA [2]. It can serve a few hundred users, to begin with, and can be scaled (with minimal, if any, service interruption) to a large deployment serving millions of users.

Digi-CA™ is the core application at the centre of the WPKI CA application and using the WPKI Registration Authority Management Console [RAMC] provides the following services:

• The mobile signature is created by the signing PIN on the mobile phone

• This PIN in combination with a key in the SIM card generates the Public Key Cryptography Standards [PKCS] key-pair

• The key-pair is then used by the Digi-CA™ WPKI system to create the digital certificate on the handset

• As required, a second key-pair can also be used to create the digital signature on the handset

In co-operation with our wireless technology partners that are members of our ARP Network [3], the deployment of the Digi-CA™ WPKI certificates and signatures from the RAMC can be partially/completely automated, as required.

To enable the wireless component on the Digi-CA™ [4] PKI system, a Mobile Signature Service Platform [MSSP] is added. By combining the Digi-CA™ and the MSSP, these two systems integrate seamlessly to provide a WPKI.

The MSSP itself has two separate components or 'stations' and these are:

• Signum service Provider Main Station [SPMS]

• Signum Operator Sub Station [SOSS]

The following schematic explains the function and location of the Digi-CA™ PKI system and the MSSP.