Viewing profile — lkowalcz

At IEX, we use kdb. Here’s a blog post from a former employee at a new startup comparing kdb against some alternative databases for common operations on financial data: https://med…

I think IEX has a free API with historical and real-time stock info: https://iextrading.com/developer/docs/

I think it's appropriate to restrict usage of the word "encryption" to methods that come with some justification for their security. I don't think that doing this stifles innovatio…

I've never heard of neural encryption before, do you have a good source for me? From the Wikipedia page for "Neural cryptography", it seems like there's some success in using NN's …

Thanks for that link! I was never able to find any details from someone who works for Numerai (or claims to at least) I still don't think it's fair to market their method as compar…

I suspect they might just be anonymizing their features (removing any labels), then normalizing them to [0,1].

Worth pointing out that Numerai actually doesn't use encryption in any standard sense (including structure-preserving encryption), but instead seems to be using some heuristic meth…

Most NSF grants and the like are for PhD students (the university still welcomes the funds they bring in, but they are a relatively small portion of income). Universities make much…

There is a huge difference in how universities treat their Masters vs. PhD students. Indeed, universities are not making loads of money off international PhD students (most receive…

Ah ok, sure. I wouldn't call something like a linear transform on anonymized features "encryption" (more like obfuscation?), but I guess it's good marketing in that it lets them as…

I'm almost positive it's not using homomorphic encryption (at least in any real sense). It's misleading how they seem to suggest that they are, though.

The encryption here is being done by "adding 20" / "multiplying by -0.5"? Given this "encrypted" X , y dataset, I could easily find the unencrypted version... (even if I don't know…

Anyone want to speculate about how the data is being "encrypted"? It seems like they don't want to say, which immediately sets off red flags in my head... I am pretty sure homomorp…

I am pretty sure homomorphic encryption is not being used. In fact, I suspect that no real encryption is being used. Isn't it the case that if I just removed the labels, and renorm…

Yeah, my first guess would be that the genetic solver is degenerating to basically a brute force search here (which is feasible in this weak instance). Will have to take a look to …

What is this part? Isn't it just by assumption? (also, by secret key, I'm guessing you mean 'a', 'b')

Surprising it took this long. (Especially since, for example, RS and A have had Turing awards for more than a decade)

The "dummies" are the authors of "Fool's Gold," to which this article is a rebuttal.

Well I can audit the source code of my client and be assured that it will only rekey when it sees proof (posted via twitter) that the person the data was encrypted for has joined. …

Also note that most homomorphic encryption schemes proposed so far are based on LWE and are therefore also conjectured to be resistant to quantum attacks.