Why is SSL/TLS Decryption Important for Security? On your next visit, a new handshake is negotiated, and a new set of keys are generated. Once you leave the website, those keys are discarded. Web browsers validate this with a lock icon in the browser address bar. The session key (symmetric encryption) is now used to encrypt and decrypt data transmitted between the client and server.īoth the client and server are now using HTTPS (SSL/TLS + HTTP) for their communication.The server decrypts the client communication with its private key, and the session is established.The client encrypts a session (secret) key with the server’s public key, and sends it back to the server.The client and server negotiate the strongest type of encryption that each can support.The client verifies this with a Trusted Root Certification Authority to ensure the certificate is legitimate.The server sends the client its certificate and public key.The client contacts the server using a secure URL (HTTPS…).Once installed, the certificate enables the client and server to securely negotiate the level of encryption in the following steps: Asymmetric encryption is used to establish a secure session between a client and a server, and symmetric encryption is used to exchange data within the secured session.Ī website must have an SSL/TLS certificate for their web server/domain name to use SSL/TLS encryption. SSL/TLS uses both asymmetric and symmetric encryption to protect the confidentiality and integrity of data-in-transit. Most website owners and operators have an obligation to implement SSL/TLS to protect the exchange of sensitive data such as passwords, payment information, and other personal information considered private. This prevents attackers (and Internet Service Providers) from viewing or tampering with data exchanged between two nodes-typically a user’s web browser and a web/app server. SSL (Secure Sockets Layer) encryption, and its more modern and secure replacement, TLS (Transport Layer Security) encryption, protect data sent over the internet or a computer network. TLDR: SSL/TLS encrypts communications between a client and server, primarily web browsers and web sites/applications.
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