Here is an overview of content I published in November:
Blog posts:
SANS ISC Diary entries:
I experienced delays in Excel whenever I would copy/paste some cells, like this:
A delay of 1 to several seconds was clearly noticeable and inconvenient.
I started to review what had recently changed on my Windows computer. Turns out this was caused by a printer setting: I had recently set a default printer (a network printer), and whenever that printer was not online, I would experience the delay.
I removed that setting and no longer have the copy/paste delay.
I had to replace a button cell, a CR1225, but I only had a CR1220.
So I just used that CR1220 in stead. This works, because a CR1220 and CR1225 differ in mechanical properties (dimension), but not in electrical properties (voltage).
Both cells have a nominal voltage of 3 Volts.
CR1220 means the following:
The difference between a CR1220 and CR1225 is the thickness: a CR1220 is 0,5mm slimmer than a CR1225. So a CR1220 fits in a CR1225 holder without problem.
I did some tests with a Keelog keylogger, the AirDrive Forensic Keylogger: I wanted to find out how much power that keylogger requires.
This is my test setup:
In this standby state, with all its LEDs turned of, the keyboard consumes 11 mW.
That’s not much power. Compare this with the Numlock LED turned on, and we have 4 times as much: 47 mW:
And here I have the keylogger plugged in (between the keyboard and the USB breakout board):
Now the total power measured is 383 mW: that’s for the keyboard (with LEDs turned off) and the keylogger.
That’s a huge difference with 11 mW for a keyboard without keylogger.
If this keylogger would be hidden into the keyboard, it would be easily detected using this measurement method, because this particular keyboard requires 30+ times less power than the keylogger itself.
This update add option -e to handle binary numeric expressions like 79+1.
numbers-to-hex_V0_0_4.zip (http)
Didier Stevens