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Excellent explanation! Thank you
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Hi As we know the below is a chain. The last two elements have expiration date. and need to update. But I have not heard the first one Root CA Cert need to update. Why is that? Thank you<br />
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Root CA Cert &gt;&nbsp;Intermediate CA Cert (bundle of Sub CA) &gt;&nbsp;Server SSL cert
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Hi As we know the below is a chain. The last two elements have expiration date. and need to update. But I have not heard the first one Root CA Cert need to update. Why is that? Thank you

Root CA Cert > Intermediate CA Cert (bundle of Sub CA) > Server SSL cert

Why Root CA Cert does not have expiration date?

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.

SSL / HTTPS

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.