Public Key Infrastructure (PKI)

Public Key Infrastructure (PKI) is a set of roles, policies, hardware, software, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates and manage public-key encryption. It forms the backbone of digital security, enabling secure electronic transfer of information (like HTTPS, digital signatures). > One-line conceptual takeaway: PKI is the foundational cryptographic framework that ensures digital trust and security on the internet. Answer: (a).