How ssl works

SSL/TLS 101 provides an overview of SSL and TLS including: 1) SSL and TLS are cryptographic protocols that provide security for internet communications like HTTPS and HTTP/2. They provide confidentiality, integrity, and authentication. 2) Key concepts of SSL/TLS include symmetric encryption for confidentiality, public key cryptography for key exchange, digital signatures for authentication, and X.509 certificates issued by certificate authorities to verify identities. 3) The document reviews the history and versions of SSL/TLS, how the core requirements of confidentiality, integrity and authentication are achieved, and references for further reading on implementing SSL/TLS.

SSL is an internet protocol for secure exchange of information between a web browser and a web server.

The Secure Socket Layer (SSL) protocol provides transport layer security to TCP applications like web browsers and servers for e-commerce. It offers security services like server authentication, data encryption, and optional client authentication. During the SSL handshake, the client authenticates the server via a certificate signed by a Certificate Authority. A master secret key is then generated and used to derive separate encryption and MAC keys to securely transmit data in both directions.

This document summarizes a seminar that covered Secure Socket Layer (SSL). It discussed SSL's overview, architecture, components, protocols for records, alerts, and handshakes. The record protocol handles fragmentation, compression, message authentication, and encryption. The handshake protocol negotiates security parameters and exchanges keys. SSL supports RSA-based and Diffie-Hellman key exchanges and uses message authentication codes. While SSL provided a major improvement in secure internet communication when it was developed, the document notes there is still room for strengthening protections against traffic analysis and improving the handshake message authentication method.

SSL/TLS is a protocol that provides encryption and authentication for web requests. It evolved from earlier SSL versions into the current TLS standard. During a TLS handshake, the client and server agree on encryption parameters and verify certificates from a certificate authority to establish a secure connection. TLS allows for session resumption to reuse encryption settings for subsequent connections via session identifiers or tickets. However, TLS is still vulnerable to man-in-the-middle and DNS hijacking attacks if certificate authorities are compromised.

This presentation gives a detailed understanding of SSL/TLS handshake and the basic idea of POODLE attack

The document presents an overview of Secure Socket Layer (SSL) technology. It discusses how SSL establishes encrypted connections to provide security and integrity. It describes SSL architecture including certificates, hashing, asymmetric and symmetric data transfer, and the SSL handshake process. It also covers encryption algorithms like RC4, AES, Triple DES, and RSA that are used. Finally, it discusses asymmetric key cryptography algorithms like Diffie-Hellman and RSA, as well as symmetric key cryptography and the future scope of encryption standards.

Transport Layer Security (TLS) is the successor to Secure Sockets Layer (SSL) and ensures privacy and security between communicating applications on the internet. TLS encrypts data transmission, works with most browsers and servers, supports flexible encryption algorithms, and is easy to deploy on many systems transparently. It operates directly above TCP and establishes an encrypted connection by negotiating a cipher suite and exchanging certificates and keys between the client and server. Once handshake is complete, both sides can communicate securely until closing the connection. TLS version and cipher suite used can be viewed in browser.

The document discusses analyzing SSL traffic and decrypting SSL connections. It provides an overview of cryptographic techniques used in SSL like symmetric and asymmetric encryption, hashing, digital signatures, and certificates. It then covers the SSL/TLS protocol structure, analyzing SSL handshakes and record layers, decrypting SSL using private keys, and tools like SSLstrip for man-in-the-middle attacks.

The document provides an overview of the Secure Sockets Layer (SSL) protocol. It discusses SSL's goals of providing confidentiality, integrity, and authentication for network communications. It describes the SSL handshake process, where the client and server authenticate each other and negotiate encryption parameters before transmitting application data. It also discusses SSL applications like securing web traffic and online payments. The document concludes that SSL is vital for web security and ensures user confidentiality and integrity.

Secure Socket Layer (SSL) was first proposed and used by Netscape to transmit sensitive data over the internet by encapsulating it in a session on top of the TCP layer. SSL aims to authenticate parties, ensure data integrity, and maintain data privacy. Certain websites can only be accessed through SSL-enabled client software. SSL establishes an association between a client and server by authenticating them and then exchanging and encrypting data using suitable algorithms to keep the information secret. SSL has two layers - the record protocol, which handles data encryption, integrity, and encapsulation, and several subprotocols like the alert, change cipher spec, and handshake protocols, which initiate and negotiate secure sessions.

SSL and TLS provide end-to-end security for applications using TCP. They operate at the transport layer and provide services like data encryption, message integrity, and client/server authentication. The key components are the handshake protocol for negotiating encryption parameters and exchanging keys, the record protocol for fragmenting and encrypting application data, and alert and change cipher spec protocols for signaling errors and key changes. Common algorithms include RSA and Diffie-Hellman for key exchange, RC4, 3DES and AES for encryption, and MD5 or SHA for hashing. Sessions define a connection's cryptographic settings while connections are the actual data streams.