Rethinking Encryption • Hacker News Board

Re: Rethinking Encryption

#121

Post by chopin » Fri, Oct 25, 2019, 6:50 AM UTC

Taniwha wrote: post #117

chopin wrote: post #46

Earlier quoted context omitted.

A one time pad must be truly random to be secure. A music stream is far from that.

The LSB are pretty close to this (unless it's Cage's 4'33)

Maybe, but I wouldn't want to rely on it. I don't know anything about real world music encodings but for the analog signal you have zero-crossings at fairly regular intervals.

Re: Rethinking Encryption

#122

Post by seppin » Fri, Oct 25, 2019, 3:07 PM UTC

skyyler wrote: post #94

seppin wrote: post #85

Earlier quoted context omitted.

In comparison to Chinese companies which comply 100% of the time with Chinese military intelligence, it matters.

I'm on your side here, but throwing around baseless acquisitions isn't helpful.

>baseless acquisitions

huh? what's baseless about pointed out the 100% compliance of Chinese companies with the CCP?

Re: Rethinking Encryption

#123

Post by backdoorsgalore » Fri, Oct 25, 2019, 3:32 PM UTC

chopin wrote: post #120

oarsinsync wrote: post #86

Earlier quoted context omitted.

'The Nth 4096 bits from this week's mod(N,100) top video on YouTube' Can you tell me what's wrong with that approach? In my head, it seems reasonable.

There are recurring patterns in a video or audio stream. More often than not these coincide with recurring patterns in the message, revealing information. For the sake of an example, take some pages of a novel as the one time pad. There will be statistical variations (not all ciphers in the ciphertext come with equal frequency) in the ciphertext, where the combination ocuring most will correspond to an "e" in the pla…

Right, but "truly random" or "pseudo random" won't matter for decoding if the 4096 can be guessed by brute force. A video file has at most tens of thousands of 4096 blocks, and he'd be picking from 100 of top videos on youtube at a known approximate date range. That's nothing as far as entropy goes.... 20-something bits.

Re: Rethinking Encryption

#124

Post by seppin » Tue, Oct 29, 2019, 4:48 PM UTC

coldtea wrote: post #96

seppin wrote: post #85

Earlier quoted context omitted.

In comparison to Chinese companies which comply 100% of the time with Chinese military intelligence, it matters.

I'm not sure token non-compliance (and non-compliance theater) makes much of a difference...

You are not sure cooperating or not cooperating matters? Or you think Apple secretly gave the FBI an iPhone unlock when they say they didn't?

What are you actually saying?

Re: Rethinking Encryption

#125

Post by jjeaff » Tue, Oct 29, 2019, 11:15 PM UTC

skyyler wrote: post #94

seppin wrote: post #85

Earlier quoted context omitted.

In comparison to Chinese companies which comply 100% of the time with Chinese military intelligence, it matters.

I'm on your side here, but throwing around baseless acquisitions isn't helpful.

It would be baseless if anyone had a single story of any Chinese company trying to go against the wishes of the Chinese government and not being either immediately arrested and "disappeared" or having the company nationalized by the government.