  If the information system is intruded or attacked by hackers, leaked personal
data or serious economic loss may occur; the threats may be serious security
problems. For security services, information security certification is built
based on Public Key Infrastructure (PKI) to be an important tool for the
services of bank transactions, natural person certificate, blockchain, and
Hyper Text Transfer Protocol Secure (HTTPS). Therefore, this study uses Taiwan
Patent Search System (TPSS) to find and analyze the contents of patents for
obtaining the innovation reports of information security certification in
Taiwan according to patents. This study considers the single-factor and
two-factors to analyze the relationships of annuals, technology leaders, market
leaders, and major applications for exploring the patent portfolios of
technology leaders and market leaders in information security certification.
