dsacco

39 ms·

301.
by dsacco 9y ago
I don’t necessarily disagree with anything you’re saying. But my point stands: the critique I responded to was incoherent.
302.
by dsacco 9y ago
> The problem is that the user experience for client-side encryption is awful! Every shared folder will need its own key, and users would need to manage and share their keys outside of our system. That is not sustainable. But then the m
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by dsacco 9y ago
> PoW turns an O(log n) transaction into an O(n) one This is a weird critique. Blockchains and banks are very different in their use cases. It’s like you’re criticizing someone for choosing a sorting algorithm over a deduplication algo
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by dsacco 9y ago
> Why would a GPU manufacturer prefer that an end user use their GPU for games rather than cryptocurrency mining? They don’t prefer anything in particular, they’d just like to keep both markets. They can bifurcate the market and earn m
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by dsacco 9y ago
You could also say it’s arbitraging energy for trusted computation, which is a generous rephrasing that acknowledges its potential. There might be cases where such an arbitrage is worth it.
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by dsacco 9y ago
> I'm talking about automated password rotation. A new 128- bit* random base64 password every month. Rotating credentials is important, even if you automate them.* To be clear, you’re aware how absurdly long it would take to comple
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by dsacco 9y ago
Yes but...password rotation doesn’t defend against that case either...so it’s irrelevant.
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by dsacco 9y ago
> Suppose it will take 100 years to crack your strong unique password once the file is breached. If the rotation period is 90 days, rotation gains you something. A strong password takes billions of years to crack with current computing
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by dsacco 9y ago
> Ideally you'd rotate them every 60 days. This isn’t correct. Password rotation is a function of desired cover time (how long you want to maintain confidentiality) and password strength (approximate entropy and complexity). If yo
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by dsacco 9y ago
Interesting, I’ll read more. Thanks for the perspective.
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by dsacco 9y ago
Speculation is investing. The difference in risk is a difference of degree, not category. Hedge funds, venture capitalists, real estate investors, etc. all routinely invest their or their clients’ assets by engaging in speculation. The wo
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by dsacco 9y ago
I’m a little unclear as to what you mean. Winternitz (W-OTS) is a hash-based digital signature scheme. ChaCha is a stream cipher for symmetric encryption. Do you mean a Winternitz signature digest encrypted with ChaCha, or are you proposing
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by dsacco 9y ago
Right, so there’s the problem. I consider post-quantum cryotography to be more important than everything else on that list aside from transaction frequency. It should be, at the least, a serious consideration for any new cryptocurrency, eve
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by dsacco 9y ago
Their website (iota.org) does not appear to have any team page. Do you mind posting a specific link?
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by dsacco 9y ago
I want to critique one particular point made in this article, becuase it’s incorrect: > IOTA uses cryptography that cannot be broken by quantum computers. The use of such cryptography, specifically Winternitz signatures, leaves IOTA use
316.
by dsacco 9y ago
> (Saying that, I am now a cryptographer and don't use much graph theory, or any of the economics and game theory I did in my undergradate :-) Game theory in particular, I am highly skeptical of, but that's another story...)
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by dsacco 9y ago
> Personally I've never found a use for either of them in practice. One of my servers batch downloads approximately 550GB of data per day. I use a bloom filter to deduplicate the file significantly faster than naive Unix sort or a
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by dsacco 9y ago
You cannot build all of analysis from category theory. Categories, morphisms and functors are not nuanced enough to encapsulate everything in analysis. The question was not, “Can you restate some results in category theory”, the question
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by dsacco 9y ago
> Haskell does a lousy job representing the majority of ideas that make category theory useful to mathematicians. For example, universal properties are neglected Haskell, and at best they're implicit. Nobody actually thinks about t
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by dsacco 9y ago
Analysis.
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by dsacco 9y ago
> 7. Colleges and universities are ground zero (and a symbol) of a (newish) culture that loudly, strongly, and explicitly rejects and condemns much of the rest of America; and especially the type of American that stereotypically would r
322.
by dsacco 9y ago
Do you mean you never graduated college, or that you literally only completed schooling up to middle school? With respect to well-roundedness: would you say your knowledge is also covers as much depth as your brother’s?
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by dsacco 9y ago
Not all decryption needs to be end to end encryption. I’m not sure when this idea developed, but it’s silly. If your threat model mandates that you use end to end encryption, go for it, and choose something other than Dropbox. But saying
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by dsacco 9y ago
This shouldn’t be downvoted. The page states clearly that data is encrypted both in transit and at rest.
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by dsacco 9y ago
Category theory is not “the high level language of math”. You cannot universally apply category theory to all other fields of mathematics.
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by dsacco 9y ago
No, you can’t. The vast majority of analysis cannot usefully be represented in category theory. You can’t express everything in analysis using morphisms and maps. When you’re working with structures (algebra, geometry, topology, etc), sure,
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by dsacco 9y ago
If you skip analysis and at least elementary topology your understanding will be limited to discrete probability, at best. If you skip abstract algebra, you’ll miss out on a lot of buildup to advanced linear transformations and operations
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by dsacco 9y ago
> Unless you do a masters degree in Data Science, AI, CS, Statistics, or a related field, a masters degree only serves as proof that you are intelligent and work hard. Someone without a masters degree can still have those attributes, bu
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by dsacco 9y ago
Sure, I agree. Abstract algebra isn’t directly helpful. But: 1. The context is knowing more math than someone who has an undergraduate degree in it, 2. Abstract algebra is part of such a degree, and contributes significantly to overall math
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by dsacco 9y ago
> If you are a math undergrad how could I ever expect to know more math than you? Read through, and do all the exercises in, one textbook each for: 1. Calculus 2. Linear Algebra 3. Abstract Algebra 4. Analysis 5. Topology 6. Probabilit

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