MITM: when a third party gets involved in your exchanges
A man-in-the-middle attack (Man-in-the-Middle, MITM) consists of intercepting communications between two parties who believe they are communicating directly, without realizing that a third party is observing, or even modifying, the data being transmitted.
Definition
The attacker positions themselves on the communication path — an unsecured public Wi-Fi network is a classic setting — and intercepts the exchanges. Without encryption robust encryption, they can read login credentials, banking data, or any information transmitted in clear text.
End-to-end encryption (HTTPS, VPN) greatly reduces this risk by making the data unreadable even if intercepted. Some more advanced MITM attacks nevertheless try to bypass this encryption, for example through a fraudulent certificate, which is why verifying the validity of secure connections is essential.
Key points
A classic setting: public Wi-Fi
An unsecured network makes it easier for a malicious third party on the same network to intercept traffic.
Reading, and sometimes modification
Beyond eavesdropping, some MITM attacks actively modify the data exchanged between the two parties.
Encryption as the main line of defense
HTTPS and VPNs make intercepted data unreadable, provided they are configured correctly.
How BCIT can support you
Securing network exchanges is part of our application security offering and of our recommendations within a Zero Trustapproach. We also raise awareness among your travelling teams about the specific risks of unmanaged public Wi-Fi networks.
Frequently asked questions ❓
Is public Wi-Fi really risky?
Yes, it is a favorable environment for interception if exchanges are not encrypted end to end (HTTPS, VPN).
Does HTTPS completely eliminate the risk of MITM?
It greatly reduces it, but some advanced attacks try to bypass this encryption, which is why it is important to verify the validity of the certificates displayed.
Not ready to talk yet? Discover our cybersecurity assessment →
Are your exchanges really protected end to end?
Let's verify the robustness of your encryption configurations.
MITM: when a third party gets involved in your exchanges
A man-in-the-middle attack (Man-in-the-Middle, MITM) consists of intercepting communications between two parties who believe they are communicating directly, without realizing that a third party is observing, or even modifying, the data being transmitted.
Definition
The attacker positions themselves on the communication path — an unsecured public Wi-Fi network is a classic setting — and intercepts the exchanges. Without encryption robust encryption, they can read login credentials, banking data, or any information transmitted in clear text.
End-to-end encryption (HTTPS, VPN) greatly reduces this risk by making the data unreadable even if intercepted. Some more advanced MITM attacks nevertheless try to bypass this encryption, for example through a fraudulent certificate, which is why verifying the validity of secure connections is essential.
Key points
A classic setting: public Wi-Fi
An unsecured network makes it easier for a malicious third party on the same network to intercept traffic.
Reading, and sometimes modification
Beyond eavesdropping, some MITM attacks actively modify the data exchanged between the two parties.
Encryption as the main line of defense
HTTPS and VPNs make intercepted data unreadable, provided they are configured correctly.
How BCIT can support you
Securing network exchanges is part of our application security offering and of our recommendations within a Zero Trustapproach. We also raise awareness among your travelling teams about the specific risks of unmanaged public Wi-Fi networks.
Frequently asked questions ❓
Is public Wi-Fi really risky?
Yes, it is a favorable environment for interception if exchanges are not encrypted end to end (HTTPS, VPN).
Does HTTPS completely eliminate the risk of MITM?
It greatly reduces it, but some advanced attacks try to bypass this encryption, which is why it is important to verify the validity of the certificates displayed.
Not ready to talk yet? Discover our cybersecurity assessment →
Are your exchanges really protected end to end?
Let's verify the robustness of your encryption configurations.