Recent comments in /f/Futurology

Ididntbreakanyrules t1_jbd1vmb wrote

Reply to Is nuclear war more likely after Russia’s suspension of the New START treaty? The nation has spurned a major arms-control agreement, pushing nuclear powers toward a worrying lack of regulation, says non-proliferation researcher. by filosoful

Its posturing. Neither side has been keeping completely honest with that and lots of agreements have been broken surrounding this war in Ukraine on both sides. He lost more soldiers in 2 months than US in 20 YEARS IN IRAQ AND AFGHANISTAN and way more than we lost in 9 yrs Vietnam in 1 year in Ukraine.

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zalgorithmic t1_jbczvnb wrote

Reply to comment by green_meklar in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

In my mind it’s best to do:

Data->compress->encrypt->steganography

Not saying steg is bad and cryptography is good, just that I don’t quite see how encrypting the data properly in the first place such that it shows up as some random distribution before embedding it with steganography is a wildly new concept.

If the distribution of encrypted data is that of noise, the image would just appear slightly noisy, especially if doing least significant bit shenanigans

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green_meklar t1_jbcz5sf wrote

Reply to comment by volci in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

No, the idea is that you leave data in the file itself that tells the recipient how to find what's hidden in it. The recipient doesn't need to see the original, all they need is the right decryption algorithm and key.

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green_meklar t1_jbcyzzs wrote

Reply to comment by volci in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

With proper cryptography, even if they do know your algorithm, they still can't read your message without the decryption key. Ideally, with good steganography, knowing your algorithm can't even tell them the message is present without the decryption key.

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green_meklar t1_jbcyt96 wrote

Reply to comment by greenappletree in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

You don't need to keep the original at all. Just delete it. The version with the hidden message should be the only version anyone but you ever sees.

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green_meklar t1_jbcyjm2 wrote

Reply to comment by zalgorithmic in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

The problem with encrypted data that looks like noise is that noise also looks like encrypted data. If someone sees you sending noise to suspicious recipients, they can guess that you're sending encrypted messages. Governments that want to ban encryption or some such can detect this and stop you.

The advantage of steganography is that you can hide not only the message itself, but even the fact that any encryption is happening. Your container no longer looks like noise; it's legitimate, normal-looking data with a tiny amount of noisiness in its structure that your recipient knows how to extract and decrypt. It gives you plausible deniability that you were ever sending anything other than an innocent cat video or whatever; even people who want to ban encryption can't tell that you're doing it.

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green_meklar t1_jbcy2qk wrote

Reply to comment by volci in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

Of course if you have both a source file and a modified version, you can detect the differences.

But with steganography there's no need for a 'source file'. You can just send some brand-new innocuous-looking file with the hidden message encoded in it. With good algorithms and a high ratio of decoy data to message data, detecting that a message even exists becomes ridiculously hard.

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Futurology-ModTeam t1_jbcx1k7 wrote

Reply to comment by [deleted] in Stanford Medicine scientists have found a way to transform cancer cells into weapons against cancer. by sgfgross

Hi, circasomnia. Thanks for contributing. However, your comment was removed from /r/Futurology.

> > i bet tree fiddy that aint gonna happen

> Rule 6 - Comments must be on topic, be of sufficient length, and contribute positively to the discussion.

Refer to the subreddit rules, the transparency wiki, or the domain blacklist for more information.

[Message the Mods](https://www.reddit.com/message/compose?to=/r/Futurology&subject=Question regarding the removal of this comment by /u/circasomnia&message=I have a question regarding the removal of this comment if you feel this was in error.

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tomrlutong t1_jbcuwvj wrote

Reply to comment by Mr_Locke in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

heres the paper. Anything is detectable if the adversary has the original. This technique claims to result in files that are statistically indistinguishable from unaltered files of the same type. E.g. you can't build a filter to examine all the videocalls going over a wire and find the one carrying stenography.

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Mindless_Consumer t1_jbcs38u wrote

Reply to comment by ImmoralityPet in A group of researchers has achieved a breakthrough in secure communications by developing an algorithm that conceals sensitive information so effectively that it is impossible to detect that anything has been hidden by thebelsnickle1991

Yea. So match the signal to that of a local star or some other natural phenomenon.

The point is - if this is impossible which it may be. Long communication in a hostile galaxy may be impossible. If it is possible an explanation for not detecting signals is they are hidden and undetectable.

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