Which system relies on digital certificates and asymmetric keys for secure transactions?

The system that relies on digital certificates and asymmetric keys for secure transactions is best represented by the concept of a Public Key Infrastructure (PKI). PKI is a framework that provides the necessary components, including digital certificates issued by a trusted certificate authority, and asymmetric keys (which consist of a public and private key pair) to secure various forms of communication and transactions over networks.

Digital certificates serve the purpose of verifying the identity of entities involved in the transactions, establishing trust. Asymmetric keys enhance security by enabling encrypted communication without needing to share a secret key. Each party has its own private key, which remains confidential, while the public key can be shared openly to facilitate encryption and digital signatures.

Secure Electronic Transaction (SET) has been designed specifically for financial transactions but is ultimately based on similar cryptographic principles. However, it is not the primary model that incorporates the comprehensive framework of digital certificates and asymmetric key systems as broadly implemented in PKI.

Secure Hypertext Transfer Protocol (HTTPS) is an extension of HTTP that uses TLS/SSL to provide secure communication over a computer network. While it implements digital certificates and asymmetric cryptography, it is still reliant on the PKI framework.

Secure Socket Layer (SSL), which was the precursor to TLS, also relies on