Do you know the 'man in the middle' attack?

A "Man-in-the-Middle" (MITM) attack is a type of cyberattack where an attacker intercepts and possibly alters communication between two parties who believe they are communicating directly with each other.

Example: during data transmission over a network, an attacker can eavesdrop on traffic, impersonate messages, or inject malicious code.

In Go, to protect against MITM, it is important to use secure protocols such as TLS. When establishing a TLS connection, certificate verification occurs, preventing server impersonation.

Example of a simple HTTPS client in Go:

package main

import (
    "crypto/tls"
    "fmt"
    "net/http"
)

func main() {
    // Create an HTTP client with certificate verification
    client := &http.Client{
        Transport: &http.Transport{
            TLSClientConfig: &tls.Config{
                InsecureSkipVerify: false, // it is important not to disable verification
            },
        },
    }

    resp, err := client.Get("https://example.com")
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    fmt.Println("Response status:", resp.Status)
}

Thus, preventing MITM attacks boils down to using encryption, verifying authenticity, and ensuring data integrity.