How Debian OpenSSL prevents man-in-the-middle attacks

In Debian systems, OpenSSL is an important library for encryption, decryption and certificate management. To prevent man-in-the-middle attacks (MITMs), the following measures can be taken:

1. Using HTTPS : Ensure that all network requests use the HTTPS protocol instead of HTTP. HTTPS uses TLS (Transport Layer Security Protocol) to encrypt communication data to ensure that the data is not stolen or tampered during transmission.
2. Verify server certificate : Manually verify the server certificate on the client to ensure it is trustworthy. The server certificate can be manually verified through the delegate method of URLSession.
3. Certificate Pinning : Pinning the server's public key or certificate to the client to prevent attackers from using forged certificates to conduct man-in-the-middle attacks.
4. Keep OpenSSL updated : Periodically update OpenSSL libraries to the latest version to patch possible security vulnerabilities.
5. Use a secure encryption algorithm : Choose an encryption algorithm that currently considered safe and avoid using algorithms that already have known weaknesses.
6. Monitoring and logging : Monitor system logs, automatically monitor and report system activity using tools such as Logwatch or Fail2ban.

Through the above measures, the security of Debian system when using OpenSSL can be significantly improved and the man-in-the-middle attacks can be effectively prevented.

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