Public Key Infrastructure (PKI)
There is a compelling case for establishing a single standard protocol for the provision of secure systems rather than allowing competition. The Public Key Infrastructure (PKI) provides a generic approach to the issue of security. PKI is an e-commerce architecture which combines specialist authorities, digital certificate management systems, and directory facilities in order to build secure networks over unencrypted networks, such as the internet . In the United Kingdom, PKI is managed by certificate authorities, such as the Post Office. All users of public keys are recorded in the form of digital certificates by the certificate authority, which oversees all aspects of data encryption. Registered users of public keys must receive approval from the Registration Authority.
PKI has proved to be a popular choice of architecture for e-businesses thanks to the effective management of public keys and certificates. Three key areas of security are offered by PKI: confidentiality, authenticity, and non-repudiation. PKI management systems provide non-repudiation, such that neither buyer nor seller can reverse an electronic transaction. Public-key encryption provides confidentiality; digital certificates ensure authenticity of identity; and digital certificates ensure non-r