{"id":3744,"date":"2025-07-17T11:24:46","date_gmt":"2025-07-17T11:24:46","guid":{"rendered":"https:\/\/certera.com\/blog\/?p=3744"},"modified":"2025-08-22T09:11:54","modified_gmt":"2025-08-22T09:11:54","slug":"what-is-pki-as-a-service-which-one-is-right-for-you-pki-or-pkiaas","status":"publish","type":"post","link":"https:\/\/certera.com\/blog\/what-is-pki-as-a-service-which-one-is-right-for-you-pki-or-pkiaas\/","title":{"rendered":"What is PKI as a Service? Which One is Right for You – PKI or PKIaaS?"},"content":{"rendered":"\n

Have you ever wondered how websites, emails, and digital transactions remain secure? Every time you log in to an online banking platform, sign an important document electronically, or visit a secure website (HTTPS), you’re relying on a system called Public Key Infrastructure (PKI)<\/a>.<\/p>\n\n\n\n

But wait, then what is Public Key Infrastructure as a Service (PKIaaS)? It is an innovative cloud-based approach that will help in setting up and managing Public Key Infrastructure. Any mistake while configuring Public Key Infrastructure (PKI) can cause errors such as expired certs, failed authentication, and a whole lot of others. It helps in managing complex PKI processes easily. Still, get confused, don\u2019t worry, this post will clear your every doubt.  <\/p>\n\n\n\n

What is Public Key Infrastructure?<\/h2>\n\n\n\n

PKI is a set of tools and processes that help secure data transfers over the Internet. It is the most common way to manage identity and security within Internet communications. <\/p>\n\n\n\n

It uses Digital certificates to protect people, devices, and Data. The digital certificates<\/a> are issued by the Certificate Authority (CA), they are trusted organisation. To get a digital certificate, you have to go through a validation process that verifies the identity of the requester, which is done by a CA.<\/p>\n\n\n\n

Also Read:<\/strong> What Is a PKI Certificate? [Detailed Guide]<\/a><\/p>\n\n\n\n

By integrating roles, policies, hardware, software, and processes, PKI serves as the industry benchmark for authentication and encryption. It is a very important component in the Zero Trust Architecture<\/a>, which verifies the identity of devices and people on the internet or in digital communication. <\/p>\n\n\n\n

The Digital certificates secure and encrypt the network traffic, helping in preventing malicious threat actors from intercepting sensitive information.<\/p>\n\n\n\n

Organizations are highly dependent on PKI solutions<\/a> to authenticate and encrypt data exchanged between web servers, digital identities, connected devices, and other applications. Nowadays, as businesses heavily depend on the internet for their daily operations, establishing secure communication channels becomes very important for the business.<\/p>\n\n\n\n

Public key cryptography is the heart of PKI, which operates using a pair of related but distinct keys for encryption and decryption. This asymmetric cryptographic system consists of a public key for encrypting messages and a corresponding private key for decryption.<\/p>\n\n\n\n

Also Read:<\/strong> What is Private PKI vs. Public PKI? Key Differences<\/a><\/p>\n\n\n\n

Cryptographic algorithms ensure that only the intended recipient, who holds the private key, can access the encrypted content. It is very important in places where one party in the communication process is automated like VPNs and IOT devices.<\/p>\n\n\n\n

Public Key Infrastructure (PKI) is not an Authentication, Authorization, and Accounting (AAA) system<\/strong>. AAA is a framework designed to regulate access to computing resources, enforce security policies, track usage, and provide data for billing purposes. These combined functions are essential for effective network security and management.<\/p>\n\n\n\n

Also Read:<\/strong> Top PKI Insights 2024 and Key Strategies for 2025<\/a><\/p>\n\n\n\n

Of the three components of AAA, only authentication<\/strong> is directly related to PKI. It alone does not provide these functions. To implement full access control, PKI needs to be integrated with a policy-driven AAA server. <\/p>\n\n\n\n

That\u2019s why certificate management solutions<\/a><\/strong> and PKI-as-a-Service (PKIaaS)<\/strong> become essential in ensuring comprehensive security measures.<\/p>\n\n\n\n

What is PKI-as-a-Service (PKIaaS)?<\/h2>\n\n\n\n
\"PKI<\/figure>\n\n\n\n

PKI as a Service (PaaS) is a cloud-based solution that helps companies manage digital certificates securely without having to set up and maintain their own Public Key Infrastructure (PKI). <\/p>\n\n\n\n

It can handle the entire Public Key Infrastructure (PKI) lifecycle<\/a>, from setting up a Certificate Authority (CA) to issuing, managing, and revoking end-entity certificates for users\u2019 devices or domains.<\/p>\n\n\n\n

It provides many important features for organisations, such as better flexibility, automated procedures, and decreased IT costs. It secures an organization’s digital assets from malicious hackers by providing strong authentication, data encryption, and integrity.<\/p>\n\n\n\n

Why is PKI-as-a-Service Important?<\/h2>\n\n\n\n

Consider a situation where a small or large organization handles sensitive data such as Personally Identifiable Information (PII), Personal Health Information (PHI),<\/strong> or Payment Card Information (PCI).<\/strong> <\/p>\n\n\n\n

To ensure the protection of this data from cyberattacks, the organization must implement the following security measures:<\/strong><\/p>\n\n\n\n