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Breaking rainbow takes a weekend on a laptop

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11–20 of 66 posts

Re: Breaking rainbow takes a weekend on a laptop

#11
post #8

How did such algorithm make it to the finalist list, passing a lot of steps?!

The same way Dual_EC_DRBG became a NIST standard, the NSA pulls the strings.

You can't expect a government department to provide robust security to the masses when the rest of the government is trying the prevent that exact situation.

At this point anything, cryptography related, coming from NIST should be considered compromised.

Re: Breaking rainbow takes a weekend on a laptop

#12
post #8

How did such algorithm make it to the finalist list, passing a lot of steps?!

The NSA hoped noone would notice.

After all these incidents we've gone through in the last decade, I'm not sure this is irony or just the reality.

It can be either, quite frankly.

Re: Breaking rainbow takes a weekend on a laptop

#13
post #8

How did such algorithm make it to the finalist list, passing a lot of steps?!

The same way Dual_EC_DRBG became a NIST standard, the NSA pulls the strings. You can't expect a government department to provide robust security to the masses when the rest of the government is trying the prevent that exact situation. At this point anything, cryptography related, coming from NIST should be considered compromised.

An apt comparison for the NIST standardization process would be the World Wrestling Entertainment. Except Vince McMahon just likes making money, whereas the NSA has the objective of interecepting all communications, forever.

Re: Breaking rainbow takes a weekend on a laptop

#14
post #4

Thanks to the informative resources linked to by jack4818 and ototot I was able to slightly wrap my head around this. I'll share my barely informed, naive understanding in the hopes that it'll help others in a similar position build on it. Please correct me if any of what I share is mistaken! Quantum computers have special properties that make them capable of breaking commonly used encryption schemes. We're dependent…

Quantum computers are good at solving the hidden subgroup problem, which generalizes RSA and Diffie Hellman.

The reason they do well in this area is that you can implement a Fourier transform with exponentially fewer quantum logic gates than classical logic gates.

Post quantum involves implementing a cryptosystem which can not be reduced to a hidden subgroup problem, but I’m still not sure if this is sufficient (QIP might solve other classes of problems easily)

Re: Breaking rainbow takes a weekend on a laptop

#16

Earlier quoted context omitted.

The NSA hoped noone would notice.

After all these incidents we've gone through in the last decade, I'm not sure this is irony or just the reality. It can be either, quite frankly.

And it doesn't even matter. It's almost a distraction to even think about conspiracy theories or worrying about sounding like a conspiracy kook.

By now it doesn't matter if there is a conspiracy or not.

The totally boring unimaginative hard nosed practical conclusion is you do not accept cryptographic advice from this source. (NIST, or the US government at large, or any other government either, or really even any large corporation.)

It doesn't require any "aliens guy" at all.

Re: Breaking rainbow takes a weekend on a laptop

#17
post #15

This isn’t the first time I’ve seen something billed as “post quantum” that is completely broken on conventional computers. I wish I could say more about that.

I know the first thing I do when involved in a project with any kind of nda is go right on HN and say I can't talk about it.

Re: Breaking rainbow takes a weekend on a laptop

#18
post #3

This is truly an incredible result. I want to adopt some PQC to my own stuff recently and considering Rainbow as one of my choice. I also know that Cloudflare is now trying to adopt these PQC protocols[0][1], so I checked the Cloudflare blog post after seeing this attack. Then, I found out a blog mentioning this attack[2], lol. [0] https://blog.cloudflare.com/making-protocols-post-quantum/ [1] https://blog.cloudflare…

The KEX schemes that seem to have received the most cryptanalysis are SIKE (SIDH that permits key reuse) and NTRU. They seem solid but I’d only use them in the real world in a hybrid scheme where the key is hashed with the result of a conventional ECC exchange. That way you get that security if the PQ algorithm ends up broken.

The signature schemes seem dodgy to me except for Sphincs and it’s variants and those have big keys and signatures. The keys are not impractically big for many uses but would be tough for things like block chains.

Re: Breaking rainbow takes a weekend on a laptop

#19
post #4

Thanks to the informative resources linked to by jack4818 and ototot I was able to slightly wrap my head around this. I'll share my barely informed, naive understanding in the hopes that it'll help others in a similar position build on it. Please correct me if any of what I share is mistaken! Quantum computers have special properties that make them capable of breaking commonly used encryption schemes. We're dependent…

"... or is the project inherently at risk of failure due to the nature of quantum computing?"

You already and automatically know it's not that, because the article was not about breaking the encryption with a quantum computer.

It was broken with trivial hardware and in trivial time.

Re: Breaking rainbow takes a weekend on a laptop

#20
post #8

How did such algorithm make it to the finalist list, passing a lot of steps?!

The same way Dual_EC_DRBG became a NIST standard, the NSA pulls the strings. You can't expect a government department to provide robust security to the masses when the rest of the government is trying the prevent that exact situation. At this point anything, cryptography related, coming from NIST should be considered compromised.

A risible argument. NSA wants NOBUS vulnerabilities: the kind they can exploit, but nobody else can, because NIST cryptography gets used on the kinds of systems NSA doesn't want exploited in a weekend with a laptop.
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