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Author Archives: Brian Brown

Should all sessions expire after disabling 2FA?

Posted on January 23, 2025 by Brian Brown

I know that when enabling 2FA all sessions must expire.
But how about disabling 2FA? Should all sessions expire then?
I know that disabling 2FA is a risk, but that’s not the question. I’m wondering only about all active sessions – do they … Continue reading Should all sessions expire after disabling 2FA?→

Posted in multi-factor, session management

ARP spoofing in Ubuntu does not work

Posted on March 3, 2023 by Brian Brown

I set up a home network using a switch and 3 computers, all having the newest Ubuntu.

I want to perform an arpspoofing along with MITM such that the attacker can see messages sent between client and a server.
On server, I set up a nc serv… Continue reading ARP spoofing in Ubuntu does not work→

Posted in arp, arp-spoofing

Difference between Bluetooth LE Secure Connections security mode 1 and level 3 and 4?

Posted on October 30, 2016 by Brian Brown

In BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part C], page 372, there is a section called LE Security Modes, which states:

There are two LE security modes, LE security mode 1 and LE security mode 2.

LE security mod… Continue reading Difference between Bluetooth LE Secure Connections security mode 1 and level 3 and 4?→

Posted in protocols | Tagged Bluetooth

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