drazvan
Joined 19 years ago
Karma
36
Submissions
30
Member since
Mar 21
Owner at WhisperCash - www.whispercash.com
View on Hacker NewsRecent submissions
Comment · 5 years ago
It's actually quite simple - an offline solution is technically incapable of reporting your spending patterns because ... well ... it doesn't connect to any network. It's the same as physical cash really, your banknote cannot report where it's been since it does not connect to anything.
Comment · 5 years ago
The fact that it's technically possible doesn't mean the banks will enforce it. The reverse is also true, if we do not offer the flexibility, someone else will (since it is technically feasible). However, most of the central banks we've talked to are looking at negative interest rates above a certain amount, not for all digital cash holdings, to discourage people from hoarding it.
Comment · 5 years ago
We do - https://www.whisper.cash/whispercash.pdf . WhisperCash is completely P2P and offline and bank policies are enforced by an on-card component (the "policy enforcer") that can require certain transactions to be performed online.
Comment · 5 years ago
Ah, those were the days... few people really cared about web security back then and Perl allowed you to get really creative :). https://seclists.org/bugtraq/1997/Jun/67 or my favorite https://insecure.org/sploits/glimps.http.badchars.html .
Comment · 6 years ago
Applications for S20 ended on March 16th, haven't they? I wanted to apply but definitely could not travel, this change makes it interesting/possible again but I'm not sure it's not already too late to apply.
Comment · 6 years ago
http://geola.com/ in Lithuania have a "hologram printing as a service" that works quite well, check them out.
Comment · 8 years ago
What secure element chipset are you using? This could be very interesting for a project I am working on. Does it run JavaCard / GlobalPlatform and are the access keys available?
Comment · 9 years ago
An old KickStarter-backed project that does the same thing is currently available at http://www.soundlazer.com/ . The physics behind it are explained at http://www.soundlazer.com/what-is-a-parametric-speaker/ .
Comment · 9 years ago
Sent an email, no reply yet, I guess you're flooded with applications.
Comment · 9 years ago
http://www.leia3d.com for instance. I have one of their early dev kit displays and it's quite impressive (but very small).
Comment · 9 years ago
On my wife's iPhone, it asked her to enter her password again and the weird thing is that it now shows as a new device, called "iPhone" instead of "Cristina's iPhone" as it was before. A few hours later it happened on my Galaxy S7 as well but re-entering passwords fixed it.
Comment · 10 years ago
I'm actually working on something based on this idea - I've created a SIM card for the Internet of Things - basically a smartcard (microSD form factor) that offers a persistent crypto-secure identity for Internet-connected objects.
It works by holding the TOR hidden service private key inside a tamper-resistant smartcard and generating/signing hidden service descriptors with it (plus an entire mechanism to prevent you from signing future descriptors - meaning that the identity is closely tied to the physical SIM card, just like in the GSM world - whoever has the SIM has the identity, once you've removed the SIM the identity goes with it).
Discussion at https://lists.torproject.org/pipermail/tor-dev/2016-June/011... - I've made progress since that post, it's now fully operational and tested, just need to figure out a way to turn it into a product and get some funding for it.
Comment · 10 years ago
I've actually used the "attack" in the article to design a P2P Bitcoin exchange based on the idea of using someone else's contactless card (with permission) in exchange for Bitcoin. This would solve one of the big issues in exchanges today - that is the fiat escrow handling.
There's a demo for a quick PoC here https://www.youtube.com/watch?v=ZsOzeELdjxM . It makes me sad that they're closing this, the fraud potential was really small (as the article implies).
Comment · 10 years ago
I'm also in Romania, making about $95k/year. I'm running it through my company, an LLC (SRL in Romanian). Starting in 2016, you can classify yourself as a micro-enterprise if you make less than EUR 100k ($112k) and you pay 3% in tax if you have no employees or 1% if you employ at least 2 people (could be you and your spouse for instance - that's what I do), then an additional 5% in dividend tax if you want to get cash in your pocket and don't expense anything. An accountant will cost you about 100 EUR (probably less in your case if you have just one monthly invoice to your client).
I'm not sure why you'd want to stay below $55k, depending on where you live you may just get additional projects and outsource them yourself to a junior dev you can monitor. That would give you your two employees to qualify for the 1% tax and you could move more of your workload to the additional dev as he/she learns stuff.