To make a machine secure, and by that we mean give you protection against having to disclose lots of personal information to all your customers if the machine goes missing, you need to use some form of pre-Windows authentication (with or without TPM it makes no difference). There was even a trivial method that allowed an attacker to gain access to a BitLocker protected system as late as November 2015 (8 years after BitLocker’s initial release) this has only recently been patched. Search for “ BitLocker Firewire,” “ BitLocker cold boot,” or “ BitLocker forensic tool” and you’ll find lots of research, and even a few tools that will unlock your nice “protected” machine and recover the data.
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There are some pretty simple attacks on TPM-only machines. BitLocker with TPM-only protection is vulnerable to cold boot, Firewire, and BIOS keyboard buffer attacks. To use BitLocker without adding additional authentication, you need an enabled, owned TPM1.2+ hardware chip.įor those of you who did go through this, we congratulate you on your foresight. You didn’t do that before you deployed your laptops? In that case, BitLocker will be a bit of a struggle for you.įact 1. OK, another show of hands for those who have enabled, and taken ownership of the chip? “Taken ownership?” You remember going through the personalization phase of the chip, enabling it in the BIOS, etc.? Remember, all TPMs are shipped disabled and deactivated. It’s a ubiquitous piece of hardware nowadays.
Hands up: How many people have a TPM chip on their laptop? Everyone, we bet. As it was designed to “protect the integrity of the operating system,” most who use it implemented it in TPM mode, which requires no user involvement to boot the machine. It is nicely integrated into Windows, it does its job well, and it is really simple to operate. Yes, BitLocker was going to secure our machines against all forms of attack and make sure we never again lost data.īitLocker is actually pretty good. For those of you who were around during the original release of Microsoft’s BitLocker, previously known as Secure Startup, you will remember that it was meant to completely eliminate the necessity for third-party security software.
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