Explain the concept and reasoning, why we need Session and Connections, two different things in SSL (what purpose(s) solved by session and what purpose(s) addressed by connection)
Session is like a memory or you can say a cache so if you have a valid session id or cookie you can resume the communication between the client and server.
The server needs to authenticate itself providing the SSL certificate to the client, but client side pe koyi certificate install hota hai kya? When we're hitting any https website, generally the server sends the certificate to the client, it shows the certificate was issued to xyz org by abc authority. However I read somewhere the mutual exchange also can be done, in that case how does the client generates the SSL certificate for itself? Is this what is called self-signed?
Nice explanation. Thanks Sir. One small query, under phase 3 it is mentioned as client certificate who/what it is referring to? I mean who generate client certificate, does all system (client) have its own default certificate or we have to create and install on client. Thanks in advance
It is optional (server to ask for client certificate and client to send it) and it is only used in 2 way SSL. This is generally used in corporate website on managed client devices like laptop, Android phone, IPAD etc, where company's PKI issues certificates to clients and then they use it to connect to some SSL application which is available only for those users with client certificates. In general internet browsing, like google, yahoo, Facebook etc. client certificate is not used.
I am unable to get session_id in the first step. Because after a successful authentication server actually provides session-id to the client. please explain
hello sir, my question is when the client sends data to the server for the first time how can the client encrypt that data because the client can't send plaintext to the server and in the first time client doesn't have the server's public key to encrypt that data from plaintext to ciphertext, so how can client encrypt data in first transmission ???
The SSL Handshake Protocol is a crucial part of establishing a secure connection between a client and a server using the SSL/TLS cryptographic protocols. It ensures that both parties can securely exchange encryption keys, verify each other's identity through digital certificates, and establish a secure communication channel. Let's delve into the details of the SSL Handshake Protocol: SSL Handshake Protocol Process: Client Hello: The SSL Handshake begins with the client (such as a web browser) sending a "Client Hello" message to the server. This message includes the client's supported SSL/TLS versions, a random number (Client Random), and a list of supported cryptographic algorithms. Server Hello: Upon receiving the "Client Hello," the server responds with a "Server Hello" message. In this message, the server selects the highest supported SSL/TLS version and cryptographic algorithm from the client's list. It also generates its random number (Server Random) and sends its digital certificate, which includes the server's public key. Certificate Validation: The client verifies the server's digital certificate to ensure the authenticity of the server's identity. It checks if the certificate is valid, has not expired, and is issued by a trusted Certificate Authority (CA). Key Exchange: After the certificate validation, the client generates a pre-master secret and encrypts it with the server's public key from the digital certificate. This encrypted pre-master secret is sent back to the server. Key Derivation: Both the client and the server now use their random numbers (Client Random and Server Random) and the pre-master secret to independently derive the master secret, which will be used to generate session keys for encryption and decryption. Session Keys: The client and server generate the session keys based on the master secret and the negotiated cryptographic algorithm. These session keys are used to encrypt and decrypt data during the secure communication. Finished Messages: The client and server exchange "Finished" messages to confirm that the handshake is complete and that both parties have established a secure connection. Information and Cyber Security Implications: The SSL Handshake Protocol is critical for ensuring the confidentiality, integrity, and authenticity of data transmitted over the internet. By using digital certificates and encryption, the SSL Handshake protects against eavesdropping, man-in-the-middle attacks, and data tampering. Confidentiality: The handshake process establishes a secure encrypted channel between the client and server, ensuring that data transmitted between them is protected from unauthorized access. Integrity: The handshake includes the exchange of cryptographic hashes that allow both parties to verify the integrity of the data. This prevents data from being altered or tampered with during transmission. Authentication: The server's digital certificate provides authentication, ensuring that the client is connecting to the correct server and not an impostor. Key Exchange Security: The SSL Handshake ensures that the encryption keys used for secure communication are exchanged securely and cannot be intercepted by attackers. Perfect Forward Secrecy (PFS): Many modern SSL/TLS configurations support PFS, which ensures that even if the long-term private key is compromised in the future, past communications remain secure. In conclusion, the SSL Handshake Protocol is a fundamental process in establishing secure connections over the internet. It plays a crucial role in ensuring the confidentiality, integrity, and authenticity of data transmitted between clients and servers. Understanding the SSL Handshake and its implications is essential for information and cyber security professionals to implement robust security measures and protect sensitive data from potential threats and attacks.
thik se samjha bhai... kyu itni halbali kar rha hai 5 min me! symmetric and asymmetric cryptography then symmetric key created and send by client to sever for further actual data communication.
complete non sense ! no info on how the server cert is validated how the keys are formed and encapuslated .data went from server to client n client to server finish🙏
