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Is it possible to look up all internet activity done by a MAC address, IP address, etc.?
1 votes

The MAC address of your computer is only used in your subnet, it won't pass beyond your router. Unless some software sticks it into documents you edit on your device. If you have a static IP address, ...

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Can an executable be scanned for calls to the vulnerable glibc ghost functions?
1 votes

To find out if this calls are used, you could simply do a strings -a /bin/ip | grep gethost Another approach returning more information is readelf --dyn-syms /bin/ip | grep gethost

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Does a rewritten file on NTFS use the same blocks?
1 votes

You can't presume that the same blocks will be used. And as said in other answers, with SSD and wear leveling, it's beyond your control. For a sensitive document I'd propose an encrypted container ...

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Can a virus persist across Windows version upgrades?
0 votes

What prevents a trojan from infecting the BIOS? You can trick the user to reboot, run a nice animation of a chkdsk while you're flashing, then another reboot. Now you can even change the hard disk and ...

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What fields in a suspicious certificate should I look at?
-1 votes

What other checks other than valid fromand valid to can you make? It's the same as if someone gives you (I'm supposing you're located in India) gives you a bank note from Argentina. How do you check ...

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What could someone do if they knew my MAC address?
-2 votes

Already in the 1980s it was possible in the WDC-adapter drivers to replace the hardware MAC address with another address. So if I knew your MAC address and I saw that you left the subnet, I could ...

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