An organization is implementing TLS to secure communication between its servers and clients. The security team is concerned about potential man-in-the-middle attacks. How does TLS protect against such attacks, and what specific mechanisms are employed to ensure the authenticity of the communication?a.TLS relies on access controls to prevent man-in-the-middle attacks.b.TLS uses digital certificates, a handshake protocol, and public-key cryptography to authenticate servers and establish a secure channel, preventing man-in-the-middle attacks.c.TLS does not provide protection against man-in-the-middle attacks.d.The TLS handshake is only responsible for encryption
Question
An organization is implementing TLS to secure communication between its servers and clients. The security team is concerned about potential man-in-the-middle attacks. How does TLS protect against such attacks, and what specific mechanisms are employed to ensure the authenticity of the communication?a.TLS relies on access controls to prevent man-in-the-middle attacks.b.TLS uses digital certificates, a handshake protocol, and public-key cryptography to authenticate servers and establish a secure channel, preventing man-in-the-middle attacks.c.TLS does not provide protection against man-in-the-middle attacks.d.The TLS handshake is only responsible for encryption
Solution
The correct answer is b. TLS uses digital certificates, a handshake protocol, and public-key cryptography to authenticate servers and establish a secure channel, preventing man-in-the-middle attacks.
Here's how it works:
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When a client wants to establish a secure connection with a server, it starts the TLS handshake protocol.
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The server responds by sending its digital certificate, which includes the server's public key and is signed by a trusted Certificate Authority (CA).
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The client verifies the server's certificate by checking the CA's signature. If the certificate is valid, it means that the server is who it claims to be, and not an attacker impersonating the server.
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The client then uses the server's public key to encrypt a pre-master secret and sends it to the server. Only the server, which has the corresponding private key, can decrypt this secret.
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Both the client and the server use this pre-master secret to generate the same session keys, which are used for symmetric encryption of the data exchanged during the session.
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If an attacker tries to intercept the communication, they won't be able to decrypt the data without the session keys. And they can't get the session keys without the pre-master secret. And they can't decrypt the pre-master secret without the server's private key. So, the communication is secure against man-in-the-middle attacks.
Similar Questions
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Man-in-the-Middle (MitM) attacks are a significant security threat in which an attacker secretly relays and possibly alters the communication between two parties who believe they are directly communicating with each other. Which of the following measures is considered most effective in preventing Man-in-the-Middle attacks?Group of answer choicesEnforcing a policy of regularly changing passwords.Limiting the physical access to network infrastructure.Implementing end-to-end encryption for data transmission.Increasing the frequency of system backup procedures
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