hey great news for everybody who actually wants to upgrade their pcs to Windows 11 the system requirements don't
look too onerous in terms of how powerful a machine you'll need but if
you look down the list you'll see something called trusted platform module
2.0 which would be fine if everyone knew
what the heck that was well as the word trusted might imply a tpm is a chip
that's responsible for some of your pc's encryption features it can both generate
and store encryption keys used for a variety of applications and the really
cool thing is that tpms even feature true random number generators
so random you see typical software based random number generators take an initial
number called a seed and run it through some algorithms which spit out a pseudo
random number because the outcome is partly determined by what that seed is
these numbers aren't completely random tpms on the other hand can use truly
random natural phenomena like temperature fluctuations to generate
numbers and encryption keys that are more unpredictable and thus more secure
you don't know where i'm going to come in that's how it works
but how does Windows actually use the features of a tpm one big time tpm
application is device encryption which encrypts your entire hard drive or SSD
storing the encryption key on the tpm when you boot up your computer and log
in with the correct password the tpm provides the key to decrypt the drive
and allow you to continue whatever you do
on your computer in this way if someone tries to steal your drive and plug it
into another pc to access your data it won't work without a recovery key and
even if an attacker tries to steal your data without physically removing the
drive from your pc like say they bypass the Windows login by booting a different
os from a usb stick tpm can protect from that as well sounds like a good thing
for an os to have tpms also have other benefits aside from drive encryption
Windows and other programs like web browsers can store keys and certificates
inside a tpm so that they don't have to live in your system RAM which is easier
for malware to exploit tpms can lock your system down for a period of time
after too many incorrect pin guesses and tpms can even detect if malicious code
has made any changes to your BIOS they do a little bit of everything so it's
pretty obvious why having a tpm in your system is a good idea but why is Windows
11 requiring it well malware attacks
especially ransomware that have specifically targeted a computer's
firmware have been on the Ryzen recent years which can bypass software
protections built into the operating system a tpm in conjunction with secure
boot which authenticates your pc's firmware and os when it starts up can
help prevent these low-level attacks and since they're becoming more common
microsoft obviously has a vested interest in ensuring Windows doesn't
gain a reputation for being an operating system with poor security which is what
apple apparently thinks of macOS but how easy is it to get a tpm is it
expensive do i have one already am i a
tpm well there's good and bad news here
most pcs manufactured since about 2016 should have tpm 2.0 especially as modern
cpus have it baked in in an implementation called ftpm with the f
standing for firmware if your CPU
doesn't have tpm 2.0 you can get yourself an add-on chip that should
connect to your motherboard at least on desktops these have traditionally been
rather inexpensive though there have been some reports of scalping recently
after microsoft announced the requirement regardless you'll want to
make sure that tpm is enabled in your BIOS as some people have failed Windows
11 compatibility checks because the tpm that is there is just not enabled
confusingly however microsoft has seemed to suggest that systems with the older
tpm 1.2 might still be able to upgrade
to Windows 11 with the caveat that doing so is not advised and they've also
published a list of compatible cpus which seems to imply anything older than
Intel 8th gen or ryzen 2nd gen aren't compatible and while there's speculation
this might be just because these chips all have tpm 2.0 support we don't know
at this point whether older cpus will flat out refuse to run Windows 11 even
with an add-on chip once it officially launches in late 2021 or what other
changes microsoft might make before release so hopefully you didn't drop two
grand on a kb lake system that'll miss out on the return of those beautiful
desktop widgets that we all definitely want
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