What digital signature certificate do I need to bid on CPPP?
A Class 3 digital signature certificate for signing. CPPP's own bid submission guide asks for a valid Class III signing certificate. Bidders on CPPP do not need a separate encryption certificate: bids are encrypted with the bid openers' certificates.
Some state portals built on the same NIC system still ask bidders for both signing and encryption certificates, so check the portal you are bidding on.