What is a "man-in-the-middle" attack?

The "man-in-the-middle" attack is a method of cyberattacks where an attacker inserts themselves between communicating parties, using this position to intercept and manipulate data transmission. Such attacks usually occur without the knowledge and consent of users or system owners.

Data interceptionThe attacker takes control of the network traffic between two points and intercepts or copies the data passing through it. This can be done at various levels: physical (using hardware), network (packet sniffing), or application (using spyware). A simple example. Imagine this situation: you are sitting in a café, connected to wireless Internet and making online purchases through your smartphone. You are about to enter your credit card information to make a payment.

However, what you might not notice is that someone else in this café is using the "man-in-the-middle" method. The attacker, using traffic interception software between your smartphone and the store's server, collects all the information you enter.

When you enter your card details – card number, expiration date, and CVV code, the attacker intercepts this data before it reaches the store's secure server. Now they have full access to your financial information and can use this information for illegal transactions or fraud.

Data manipulationAfter gaining access to digital data (between the device and the server), the attacker can modify it or insert their data to achieve their goals. For example, they can change the website address you are trying to access or insert malicious code. A simple example. You confirmed a cryptocurrency transfer, but the attacker replaced the recipient's wallet address with their own.

Traffic redirectionThe attacker can redirect traffic to their servers, allowing them to access confidential information and even interfere with communication between parties. Example. To obtain your personal data - first, the attacker redirects you to a fake website that looks externally like the real one. And there you enter your payment details, and the attacker receives them.

Use secure connectionsAlways use secure data transmission protocols, such as HTTPS for websites and SSH (for advanced users) for network connections. This will make it more difficult to intercept and manipulate data.

Use virtual private networks (VPN)VPNs provide traffic encryption and ensure privacy. They can also prevent "man-in-the-middle" attack attempts. But be careful and use reliable services. There are fake VPN services that eavesdrop on your traffic and themselves act as "man-in-the-middle".

Update softwareEnsure that all programs and operating systems are up to date. Manufacturers often release patches that close vulnerabilities that can be exploited for attacks.

Be cautious with unknown internet networksAvoid connecting to unknown and untrusted networks, especially those without password protection. They can be easily used for "man-in-the-middle" attacks. Sometimes such networks are deliberately created by attackers.

Use multi-factor authenticationAdd additional layers of protection, such as multi-factor authentication, to provide an extra level of security.