[kwlug-disc] Encrypted disk vs Encrypted Home

[Ron Singh]

dm-crypt and LUKS, and I have the Intel i7-2640M SandyBridge CPU with AES
built-in, but I have no idea(yet) if dm-crypt uses any sort of built-in CPU
encryption schemes.

*Perhaps I should keep a piece of balsa wood(nice and light) in my knapsack
as a lap platform and be done with it.*

Thanks,

Ron S.



On Thu, Apr 23, 2020 at 8:17 PM Benjamin Tompkins <bjtompkins at gmail.com>
wrote:

> Do you know what cipher is being used, and is that cipher built into the
> CPU?
>
> You may need to back up the data and re-encrypt the drive with a cipher
> that the CPU  can do in hardware and not rely on it performing the
> calculations in software.
>
> On Thu, Apr 23, 2020 at 7:16 PM Ron Singh <ronsingh149 at gmail.com> wrote:
>
>> I use laptops exclusively, I use Linux Mint all day long for my various
>> jobs. I have a fleet of older Thinkpads I use for each biz/client.
>>
>> I grow more fearful of having my laptop du jour stolen.
>>
>> I have 3 identical laptops set up with Mint 18.2(based on Ubu 16.04 LTS)
>> with the same power profile(using TLP).
>> One has no encryption, 1 has encryption only on Home, the last has the
>> entire SSD encrypted.
>> - No encryption, idle temp is 39-40C (no issues on lap)
>> - Encrypted Home,  idle temp is 42-45C (warm on lap but not uncomfortable)
>> - Encrypted Disk, idle temp is 46-50C (uncomfortable as hell on lap)
>>
>> Any ideas on how to get that Encryted Disk temps down? I have the CPU
>> locked down at 1.2Ghz max(from 2.6Ghz), unused ports go to sleep, running
>> an SSD, fan is set  for aggressive blowing to reduce internal chassis temp.
>>
>> Thanks,
>>
>> Ron S.
>>
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