/infosec/ Information Security General

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Anonymous
/infosec/ Information Security General 2016-10-30 01:06:18 Post No. 57302198
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/infosec/ Information Security General Anonymous 2016-10-30 01:06:18 Post No. 57302198 [Report]

Most FDE schemes seem to use AES-XTS with 128-bit effective key size (256 bit key, split, =AES-XTS-128). So we can treat this as AES-128.

Grover's algorithm, as I understand things, means that AES-128 is not post-quantum secure at all. Sufficiently powerful adversaries could begin collecting AES-128 encrypted drives now, and feasibly decrypt them when quantum computing is practical (which, for all we know, it already is.)

Doesn't this mean FDE solutions need to migrate to 256-bit effective key strength ASAP? For XTS that means a 512-bit key for AES-XTS-256.

Anonymous 2016-10-30 01:07:13 Post No.57302208
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Anonymous 2016-10-30 01:07:13 Post No.57302208 [Report]

This is too complicated do you have any memes

Anonymous 2016-10-30 01:17:25 Post No.57302328
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Anonymous 2016-10-30 01:17:25 Post No.57302328 [Report]

> when quantum computing is practical (which, for all we know, it already is.)

I think practical isn't really a description of the current state of quantum computing.

However, it it were, beating a fully entangled quantum computer is going to require more than just an increased key size. You'd want to switch to lattice base crypto. Which, while not completely tested, show promise against both traditional and quantum attacks.

Anonymous 2016-10-30 01:23:39 Post No.57302401
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Anonymous 2016-10-30 01:23:39 Post No.57302401 [Report]

>>57302198
>using NIST algoritms
>ever
Stop using AES and switch to SERPENT-XTS-512
as for asymmetric algos use trust algos from djb

Anonymous 2016-10-30 01:27:00 Post No.57302435
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Anonymous 2016-10-30 01:27:00 Post No.57302435 [Report]

>unironically believes AES can survive quantum computing by increasing the bit length

Anonymous 2016-10-30 04:00:29 Post No.57303932
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Anonymous 2016-10-30 04:00:29 Post No.57303932 [Report]

lookup netsec general on the wiki, already exists and is what you wanted

Anonymous 2016-10-30 04:09:53 Post No.57304001
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Anonymous 2016-10-30 04:09:53 Post No.57304001 [Report]

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>>57302198
>when quantum computing is practical
Why can't these enormous bitcoin mining farms do this?

Anonymous 2016-10-30 04:18:57 Post No.57304068
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Anonymous 2016-10-30 04:18:57 Post No.57304068 [Report]

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>>57302208
Here you go, friend.

https://i.4cdn.org/wsg/1476619728127.webm

Anonymous 2016-10-30 04:19:57 Post No.57304074
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Anonymous 2016-10-30 04:19:57 Post No.57304074 [Report]

>>57304001
because math is a bitch but quantum computing works differently and obeys different laws

Anonymous 2016-10-30 04:25:36 Post No.57304105
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Anonymous 2016-10-30 04:25:36 Post No.57304105 [Report]

>>57304068
Thanks for the seizure and soiled pants.

Anonymous 2016-10-30 04:34:36 Post No.57304158
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Anonymous 2016-10-30 04:34:36 Post No.57304158 [Report]

>>57304105
You soiled your own pants

Don't put this on me

Anonymous 2016-10-30 04:38:07 Post No.57304183
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Anonymous 2016-10-30 04:38:07 Post No.57304183 [Report]

>>57304158
Actually, I was wearing my dads pants. Not cool.

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible. Read more on this topic here - https://archived.moe/talk/thread/1694/

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/