Koal Software Co., Ltd. develops public key infrastructure platform in China. The company offers identity security infrastructure, such as root certificate issuing, certificate issuing, certificate enrollment auditing system, key and certificate integrated management, and trusted identity management and control systems; cryptographic service platform, including timestamp and signature verification servers, and electronic signature systems; and authentication and access control products comprising secure authentication, SSL application delivery, API, and single sign-on gateways, as well as account management systems. It also provides endpoint security and admission control products, such as LAN access control, and endpoint security login and file protection systems; and data security and privacy protection products, including secure email, Internet safe, net shield safe, USB guardian, print control, and secure instant messaging systems.