Explain the role of public key infrastructure in creating trust in an online medium.

Public Key Infrastructure (PKI) is fundamental in fostering trust within cyberspace, especially in commerce and online transactions. PKI provides a secure framework for encrypting, authenticating, and validating communications, ensuring confidentiality, data integrity, and authenticity in an online medium. Its role is pivotal in addressing the challenges of trust, a critical factor for the growth and reliability of e-commerce and other cyber activities.

### Key Components of PKI
PKI comprises several elements, including digital certificates, Certificate Authorities (CAs), and public-private key pairs. Digital certificates act as virtual credentials for individuals, organizations, or devices, verifying their identity. These certificates are issued and vouched for by trusted third-party entities called Certificate Authorities (CAs). The use of asymmetric encryption, involving a public and private key pair, ensures secure communication by enabling encryption and decryption.

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