Question

What kind of PKI structures do exist and what could be problems with complex structures

Answer 1

PKI structures include centralized, decentralized, and distributed structures. Complex structures can face interoperability issues, increased vulnerabilities, and management complexity.

Step-by-step explanation:

A Public Key Infrastructure (PKI) is a set of policies, procedures, and technologies used to enable the secure exchange of information over an insecure medium. There are several types of PKI structures:

• Centralized PKI: In this structure, a single entity, such as a Certificate Authority (CA), is responsible for issuing and managing digital certificates. Examples include a corporate PKI.
• Decentralized PKI: In this structure, multiple entities act as CAs and each issues and manages digital certificates independently. Examples include self-signed certificates.
• Distributed PKI: This structure combines both centralized and decentralized elements, where there is a central CA but it delegates some certificate issuance and management responsibilities to subsidiary CAs.

Problems with Complex PKI Structures
Complex PKI structures, such as those involving multiple CAs or distributed CAs, can face challenges:

1. Interoperability Issues: Different CAs may have different certificate formats or policies, leading to difficulties in certificate validation.
2. Increased Vulnerabilities: The more entities involved, the greater the potential for security vulnerabilities, such as compromised CAs or weak security practices by subsidiaries.
3. Management Complexity: Complex PKI structures require specialized knowledge, resources, and coordination to maintain and manage effectively.