SSL certificates and TIS certificates are small data files that can be used to protect the security of data transmission between servers. In the current internet environment, SSL certificate has almost become one of the necessary conditions for building websites. At the beginning, all the information shared by users and websites is in plain text form, transmitted from the browser to the web server using HTTP. This transmission method without encryption is prone to network attacks, such as man in the middle attacks, which can lead to interception and theft of sensitive information. To prevent such incidents from happening, the TLS protocol was born. What is the difference between SSL certificate and TLS certificate?

 The difference between SSL certificate and TLS certificate

For ordinary users, the application of SSL and TLS certificates is of little significance. When browsing a website on a daily basis, it is found that there is a padlock icon next to the URL of the website, which can confirm that the website is secure. For webmasters, the application of SSL/TLS certificates is very important. A secure digital certificate is a digital file that verifies the identity of a server. A browser can establish a secure connection through an encryption protocol, so that both parties to the communication protocol can hide their data for input and output to improve data transmission security.

Using SSL and TLS certificates, encryption is only a part of the handshake between the client and server. SSL 2.0 only uses RSA (Rivest Shamir Adleman) key exchange. The TLS version also supports Diffie Hellman (DH) key exchange. TLS 1.2 introduced support for elliptic curve cryptography, while in TLS 1.3, RSA has been removed.

All encryption technologies are collectively referred to as complex algorithms of Cipher suite, which can convert the original plaintext information into encoded ciphertext, and all use public key encryption. The SSL/TLS certificate is digitally signed by a CA, which creates a signature using its private key and provides proof of identity to the holder.

SSL and TLS protocols want to accomplish the same thing, and each new version of TLS protocol has significant differences in its methods and security improvements compared to earlier SSL versions. For example, the TLS protocol uses fewer and more efficient Cipher suite, leaving no room for hackers to provide perfect security functions. In addition, the SSL certificate only supports the 1024 bit RSA key used in the PFS Cipher suite; The biggest difference between SSL and TLS is message authentication. SSL uses Message Authentication Code (MAC) to ensure message integrity during transmission.

In summary, it is about sharing the differences between SSL certificates and TIS certificates. Everyone is interested in network security. You can visit the news section of Jtti's official website to learn more!