lkowalcz

6 ms·

1.
Examining Execution Stability at IEX(medium.com)
2 points by lkowalcz 6y ago|0 comments
2.
by lkowalcz 7y ago
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://medium.com/prooftrading/selecting-a-databa
3.
IEX's year-end review of US equity market structure(medium.com)
5 points by lkowalcz 7y ago|0 comments
4.
CFAIL 2019: Conference for Failed Approaches and Insightful Losses in Cryptology(cfail2019.com)
4 points by lkowalcz 8y ago|0 comments
5.
by lkowalcz 9y ago
I think IEX has a free API with historical and real-time stock info: https://iextrading.com/developer/docs/
6.
by lkowalcz 9y ago
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 innovation (In fact, I think requiring crypto inn
7.
by lkowalcz 9y ago
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 for cryptanalysis, but not for cons
8.
by lkowalcz 9y ago
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 comparable to Aslett's scheme or "standard&quo
9.
by lkowalcz 9y ago
I suspect they might just be anonymizing their features (removing any labels), then normalizing them to [0,1].
10.
by lkowalcz 9y ago
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 method of obfuscating their data. Their (closed-source) met
11.
by lkowalcz 10y ago
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 more money off their Masters students, most of whom are int
12.
by lkowalcz 10y ago
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 free tuition, a stipend, etc). However, international Maste
13.
by lkowalcz 10y ago
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 associate with the "recent advances i
14.
by lkowalcz 10y ago
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.
15.
by lkowalcz 10y ago
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 20 or -0.5, this st
16.
by lkowalcz 10y ago
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 homomorphic encryption is not being used. I think if
17.
by lkowalcz 10y ago
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 renormalized all my data to fall in [0, 1], then what I end u
18.
by lkowalcz 10y ago
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 confirm...
19.
by lkowalcz 11y ago
What is this part? Isn't it just by assumption? (also, by secret key, I'm guessing you mean 'a', 'b')
20.
by lkowalcz 11y ago
Surprising it took this long. (Especially since, for example, RS and A have had Turing awards for more than a decade)
21.
Security-Focused Approach to Implementing TLS(blog.acolyer.org)
2 points by lkowalcz 11y ago|0 comments
22.
Using EMET to Disable EMET(fireeye.com)
41 points by lkowalcz 11y ago|7 comments
23.
by lkowalcz 11y ago
The "dummies" are the authors of "Fool's Gold," to which this article is a rebuttal.
24.
by lkowalcz 11y ago
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. Keybase doesn't have my private key (only I do), so the
25.
by lkowalcz 11y ago
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.
26.
by lkowalcz 11y ago
Apparently they reuse the primary wallet quite frequently: http://www.coindesk.com/cryptowall-325-million-bitcoin-ranso...
27.
by lkowalcz 11y ago
For (1), this is the reason the ransom is small. Since "many" are actually trustworthy, it's a small risk to pay the relatively small ransom. (Also, you can verify via bitcoin address if you're dealing with a hacker who
28.
by lkowalcz 11y ago
The hacker actually has incentive to fulfill their end of the bargain. If they didn't, the victim might go public with this, and then no one would ever pay the ransom. The hacker wants to be trustworthy here so that new victims will be
29.
by lkowalcz 12y ago
Maybe try joining a Fantasy Football league with some of your friends? Doing this will greatly improve your enjoyment because you will be invested in the performance of the players / teams on your fantasy team.