Re:UC Berkeley profs lambast new “black box” network monitor...
by nindalf on Monday February 08, 2016 @05:48AM
(#11057403)
My understanding is that it can decode all HTTPS traffic because it acts as a Man-in-the-Middle. Traffic from the client to the Fidelis device is encrypted with a Fidelis certificate. Its decrypted at the device, encrypted again with the actual certificate and sent to the destination. If it couldn't do this, I think it would be impossible to distinguish benign traffic from malicious traffic.
I have worked in the area of computer networking for many years. My guess is, one of the things the black box product is doing is typically looking for TCP or IP traffic patterns(packet flow patterns) that indicate say command control type of malware, or other malwares, that don't have much resemblance to packet flow signature of user browsing activity.
Also, this blackbox won't be able to decode HTTPs anyway. So may not be a privacy concern for most people?