![]() By saying we use HMAC SHA-384, we are saying that you can be confident that once you are connected to one of our servers, your connection cannot be interfered with or spoofed.īut how does HMAC SHA-384 do that? If you expand the acronyms, you have ‘ hashed message authentication code secure hash algorithm 384 bit.” While this might be more precise, it probably is not any more helpful to the average VPN user. ![]() It authenticates that the traffic we are sending your device really came from our servers and that it has not been tampered with along the way. ![]() In a nutshell, HMAC SHA-384 is the method that ProtonVPN uses to assure your messages are safe traveling between your device and our VPN servers. This statement gives you information that is essential to evaluating how safe our VPN service is, but it’s useless unless you know what it means. On our security features page, we mention that we use HMAC SHA-384 for message authentication. Virtual private networks like to use a lot of acronyms and technical jargon to describe their security. ![]() Unless users understand what these technical terms mean, they cannot make an informed decision.Įdit: this article was updated to more accurately reflect the security SHA-384 offers against length-extension attacks. We explain what “HMAC SHA-384” means and how it contributes to a safe VPN.
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