![]() First and foremost, everyone needs to… shake hands?! There’s a lot going on underneath the hood when you connect to a website via HTTPS. TLS 1.2 uses a handshake that makes multiple roundtrips between the client and the server. The SSL/TLS Handshake Process in TLS 1.2 vs TLS 1.3 That latency has been addressed in more recent versions of the TLS protocol though, so that’s almost entirely untrue today - especially with HTTP/2 and HTTP/3.Ĭurrently, there are two different versions of the TLS handshake in use: TLS 1.2 and TLS 1.3. Historically, the SSL/TLS handshake has added a small bit of latency to a connection, which is what led to the claim that HTTPS slows down your website. The client encrypts a copy of the session key and sends it to the server for use during the connection.They determine the parameters of the HTTPS connections ( what cipher suite will be used), and then.The client and server authenticate one another,.That’s essentially what the SSL/TLS handshake is for - it’s a set of checks where: Authentication is important because the client wants to make sure it’s connecting with the correct party. While 256-bit encryption is still sufficiently robust, the real security is at the gate where a much larger, much stronger private key (generally a 2048-bit RSA key) helps handle the authentication portion of the connection. They can use it to encrypt and decrypt the data that transmits between them. When a symmetric key is generated, both parties get a copy. During an HTTPS connection, the communication is actually done with symmetric session keys - generally 256-bit advanced encryption standard (AES) keys - that are generated on the client side of things. If you simplify public key infrastructure (PKI) -which serves as the infrastructure for the entire SSL/TLS ecosystem - it’s really about secure key exchange. Exchanges the symmetric session key that will be used for communication. ![]() Determines the TLS version and cipher suite that will be used for the connection.Authenticates the server as the rightful owner of the asymmetric public/private key pair.The TLS handshake process accomplishes three things: So, you’ll see “SSL handshake” and “TLS handshake” used interchangeably throughout the content, but just know that we’re still talking about the TLS handshake.) However, we’ll still refer to it as such throughout the article because people still commonly use the term. (SSL is no longer technically accurate since it’s a deprecated protocol. This is known as the TLS handshake, although some within the industry still refer to it as an SSL handshake. What Is the SSL/TLS Handshake?Īt the beginning of every HTTPS connection, the client (the internet user’s web browser) and the server (hosting the website) must go through a series of checks - for lack of a better term - to authenticate one another and determine the parameters of the encrypted connection. We’ll get into what the SSL/TLS handshake is, then we’ll cover the reasons for the SSL/TLS handshake failed error and what you can do to fix it. This is bad for users and site owners alike - for the site owners because it drives away business (potentially straight into the arms of your competitors). Regardless of its origins, this can be a frustrating SSL error because it prevents you from making a secure connection with the website you’re attempting to access. Like many SSL error messages, the SSL handshake error can be triggered from both the client-side and the server-side, so sometimes it can be fixed by regular internet users and other times it’s indicative of a configuration issue on the website’s part. Today, we’re going to discuss the SSL/TLS handshake failed error and the ways to fix it. In Everything Encryption Fixes for the SSL/TLS handshake failed error for both internet users and site owners
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