Public Key Infrastructure: 5 Things You Should Know About

By | February 10, 2024

Digital identities have been crucial to cyber security in recent years. Major companies have felt the need to focus on cyber security with the aid of verified digital identities due to the rise in remote employees. They have access to business networks thanks to it. The number of portals that need a username and password to access any device is growing.


Managing certifications across IT environments is the key problem that today’s IT leaders must solve. Instead, it’s growing more entangled, intricate, and dispersed. PKI-based digital certificates are the most effective method for authenticating digital identities in this digital age. It provides the strongest cyber security defense and one of the most straightforward authentication processes. Additionally, PKI provides a strong encryption option for business networks.


So, apart from this, here are five things should you know about PKI:

1.   Public Key and Private Key


A public key is a cryptographic key that one can share with anybody and does not require a safe location. Here, you can use two keys – the first for encryption and the second for decryption. But in a private key, only one key is used for both encryption and decryption. Only the appropriate private key may decode messages after encrypting them using the PKI solution.

The recipient uses it to decrypt a communication that underwent encryption using a public key. This proves who owns the private and public keys and guarantees that only authorized people may view the message.


2.   Symmetric and Asymmetric Encryption


Symmetric encryption was cutting-edge technology, but it is now the fundamental cryptographic method. It isn’t easy to decrypt a message after submitting it in plain text using symmetric encryption since the simple text letter may not seem the same in the encrypted message. For instance, “HHH” will not encrypt up to three similar letters.


Symmetric encryption refers to using a single key for message encryption and decryption. Using the same key to encrypt or decode a message poses a significant risk, even if it is challenging to decrypt communications without a key. The fundamental reason is that when the critical distribution route compromises, it may impact the entire encrypted communications system.


Asymmetrical cryptography, also referred to as asymmetric encryption, solves the exchange problem in symmetric encryption. Creating two cryptographic keys, a public key and a private key, makes it possible to accomplish this. Asymmetric encryption uses mathematical variations to encrypt a message. But to decode it, you need the private key, which is available only to the recipient. Instead, you may encrypt it and make the public key available to everyone. Additionally, asymmetric encryption makes it possible to do extra activities like digital signatures that are challenging to perform with symmetric encryption.


3.   Certificate Authority (CA) and Registration Authority (RA)

The phases of certificate lifecycle management are typically handled by the CA and all other facets of certificate administration for a PKI. A CA generates certificates that can help to verify that the person whose name is present on the document indeed owns the public key. The client creates a public-private key pair in a PKI system. The CA receives the public key and the data that is written on the certificate. It combines the user’s public key and other certificate characteristics to generate a digital certificate. And the CA uses its private key to sign it.


Once the users get the certificate, they may display the signed certificate, and the receiver can identify the client when the public and private key pairs match.


CA may use a third-party Registration Authority (RA) to carry out the required identification verifications on the individual or business obtaining the certificate. Although the RA could pose as a CA to the client, they do not sign the issued certificate.

4.   Web and Email Security


You must be able to connect with websites in the modern digital environment without fear of hacking. PKI makes HTTPS possible. Web servers (also known as websites) and browsers may connect safely and securely thanks to the HTTPS protocol. You need an SSL/TLS certificate to have an HTTPS website.


You get the public and private key combination when you install an SSL certificate on your website. The web server securely stores the private key so that a user’s browser can recognize a website (server) as trustworthy. Users can now browse websites safely as they buy, provide personal information, and make payments.


Another critical area that PKI impacts is email security. PKI allows you to send the infrastructure needed for emails to another person securely. Secure/Multipurpose Internet Mail Extension (S/MIME) is the name of this procedure. Email messages undergo encryption and are digitally signed using S/MIME certificates to establish the sender and the message’s authenticity. This aids in preventing hackers from altering emails.


5.   Private Key Tokens


While a client’s associated secret private key can be on the key owner’s computer, the client’s public key remains on the certificate. In general, this approach is not used; an attacker can access the private key if he has access to the machine. Because of this, a private key remains on a secure portable storage token that requires a password to access.


For storing keys, manufacturers frequently employ various and occasionally proprietary storage formats. For instance, Verisign, GlobalSign, and Baltimore employ the common.p12 format, whereas entrust uses the proprietary.epf format.

Final Note


Every day, cyber security becomes increasingly complicated. Hackers are developing novel attacks and innovative ways to repurpose tried-and-true tactics. As a result, maintaining gatekeeping is now just as important as safeguarding your network and keeping your data safe from hackers. Public key infrastructure is becoming increasingly vital to cyber security for companies and organizations of all sizes.


PKI is what enables you to secure and safeguard the integrity of your data, regardless of whether you want to protect your intellectual property or the privacy of your customers. Additionally, it enables verification by allowing a reliable outsider to confirm your validity. Therefore, understanding how PKI functions are crucial to ensuring that the system continues functioning as intended.

Leave a Reply

Your email address will not be published. Required fields are marked *