Market Size: Estimated $1.3 billion world market by 2003. Worldwide revenue from PKI products will soar to $1.3 billion by 2003 from $122.7 million in 1998 according to market researcher International Data Corp. Market Niche: B2B and B2C companies. Companies engaged in electronic banking, online bill payment, financial trading, and e-commerce retailing, to complex business processes such as eProcurement, eFulfillment, and eBusiness processes that require online contracts.