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Elastic Load Balancing (ELB)AWS Private Certificate Authority (PCA) is a managed private CA service that extends AWS Certificate Manager (ACM) capabilities, allowing enterprises and developers to securely and efficiently manage the lifecycle of their own private certificates. This service offers a streamlined and scalable approach to create and manage private certificates without the need for expensive, specialized hardware or complex manual processes.
The value of AWS PCA lies in its integration within the AWS ecosystem, simplifying tasks such as issuing, revoking, and renewing certificates specifically for internal servers, applications, services, and devices. AWS PCA enables the establishment of one or more private certificate authorities within an AWS account. These private CAs can hierarchically fit into your organization's needs, supporting a structure that can include root and subordinate CAs, mirroring typical, traditional enterprise trust models. This customizable hierarchy allows for a tailored approach to trust management and certificate issuance, empowering businesses to enforce their security standards and policies precisely.
AWS Private CA's OCSP implementation does not support request extensions. For a batch query containing multiple certificates, the responder processes only the first certificate and drops the others. Revocations can take up to an hour to appear in OCSP responses.
AWS Private CA supports CA hierarchies with up to five levels, and you can create multiple hierarchies, each with its own root. Additional hierarchy levels lengthen the certification path and increase end-entity certificate validation time.
AWS Private CA supports two operating modes: general-purpose mode, which supports any permitted certificate validity period, and short-lived certificate mode, which issues certificates valid for no more than seven days.
The service simplifies the otherwise complex and costly process of setting up and maintaining a private CA. There's no need to invest in dedicated hardware or worry about the software updates and security patches required for a self-managed CA infrastructure. AWS PCA is highly available and scales automatically to meet the demands of issuing and verifying certificates. This scalability ensures that as an organization grows, its ability to secure communication within its network and control access to its resources keeps pace, without the need for significant additional investment or reconfiguration.
The per-CA certificate issuance quota is 100 million when revocation is disabled or uses partitioned CRLs and/or OCSP. CAs using complete CRLs instead have a quota of 1 million issued certificates.
AWS PCA integrates seamlessly with other AWS services, enhancing security and efficiency across an organization's AWS infrastructure. For instance, when used in conjunction with AWS Identity and Access Management (IAM), it can simplify the process of issuing and managing certificates for individual users or systems, reinforcing security policies and access controls. Moreover, by leveraging ACM's capabilities, the management of private certificates becomes easier, supporting automatic renewal and deployment of certificates, thus reducing the risk of outages caused by expired certificates.
Security is a paramount concern for AWS PCA, offering features such as automatic recording of certificate authority activity to AWS CloudTrail, which aids in audit and compliance efforts. CA private keys are stored and protected in AWS-managed hardware security modules, rather than encrypted using AWS Key Management Service (KMS). This protection not only bolsters security but also facilitates compliance with stringent regulatory standards that require detailed audit trails and high assurances of key protection.
In summary, AWS Private Certificate Authority offers a formidable solution for businesses looking to efficiently manage their private certificates. It reduces the operational burden and costs associated with traditional private CA deployments. By leveraging the AWS cloud infrastructure, it provides a secure, scalable, and integrated environment for certificate lifecycle management, catering to the intricate needs of modern digital enterprises aiming to bolster their security posture in a complex cyber landscape.