magnat

18 ms·

181.
by magnat 9y ago
> I'm not sure how much clearer you could mark that. It's not about this warning. It's about that it's the only warning. From the intro and from discussion here on HN, I imply author knows about other shortcuts made f
182.
by magnat 9y ago
> I'll also try to point out more explicitly which parts I think are not secure. Things I've noticed: * Use of floating point arithmetic. * Non-reproducible serialization in verify_transaction can produce slightly different, bu
183.
by magnat 9y ago
> It is NOT secure neither a real blockchain and you should NOT use this for anything else than educational purposes. It would be nice if non-secure parts of implementation or design were clearly marked. What's the point of educatio
184.
by magnat 9y ago
Looks like an insect stuck on the camera lens.
185.
by magnat 9y ago
Blackhat 2017 presentation based on the paper: https://www.youtube.com/watch?v=9A9XNx9_Vyc
186.
by magnat 9y ago
There is somewhat similar concept of Bitrate peeling [1] in Ogg Vorbis. You can drop portion of the stream without transcoding and still be able to decode original audio at lower bitrate. With proper over-the-air modulation and multiplexing
187.
by magnat 9y ago
What's the point of removing features such as "menu" from HTML standard? If there are browsers supporting it and webpages using it, would Mozilla (or Google or Microsoft) actually remove those features just because newest sta
188.
by magnat 9y ago
Would it be possible to emulate whole Z80 or CPC platform at a transistor/circuit level (as in Visual 6502 [1]) in real time on a modern PC with a GPGPU? [1] http://www.visual6502.org/JSSim/
189.
by magnat 9y ago
> Lexicographical sorting by class-name to make things easier to find This is weird. I've never encountered (or noticed) ordering parameters by their type names. Semantic ordering (subject, object, adverb, optionals) makes more sens
190.
by magnat 9y ago
If you run your own LN node, your channel is associated with your IP, and your transactions are associated with your channel. It is the same as reusing a single bitcoin address for all your transactions, with all the consequences [1], excep
191.
by magnat 9y ago
> In addition, its processor includes two 200-MHz microcontrollers that allow you to implement low-latency, real-time functions while still having the capabilities of a Linux system. This is brilliant. Inter-processor communication [1] f
192.
by magnat 9y ago
I've got similar experience. It turned out my (four letter) domain is one letter away from some other domain and was detected as a typosquatting. Only way to get certificate from them would be to undergo Extended Verification.
193.
by magnat 9y ago
Hard disks are surprisingly hard to destroy on-demand. There was a DEF CON 23 talk [1] exploring ways to quickly wipe your servers in situ using physical methods. [1] https://www.youtube.com/watch?v=-bpX8YvNg6Y
194.
by magnat 9y ago
Site is down at the moment, archived version available at http://archive.is/PtBr6
195.
by magnat 9y ago
You can use custom kernel filter on Windows and iptables/netfilter on Linux to allow only one process to access physical interface. I've seen Cisco VPN Client (10 years ago or so) do it - apart from CVPND service, all traffic to&#
196.
by magnat 9y ago
> Take every byte of traffic sent to a network device, and tunnel it to another endpoint? You have to set up routing tables to decide which interface to use for which destination address. Obviously you can't direct VPN packets via V
197.
by magnat 9y ago
Previous discussion: https://news.ycombinator.com/item?id=15720923
198.
by magnat 9y ago
Joanna's (Qubes OS Founder) blog [1] is a gold mine when it comes to hardware-software boundary security. Especially "State considered harmful" [2] and "x86 considered harmful" [3] papers are eye-openers. [1] https
199.
by magnat 9y ago
Slightly off-topic: what program is used to produce disassembly graphs as those in article?
200.
by magnat 9y ago
And in php (after https://eev.ee/blog/2012/04/09/php-a-fractal-of-bad-design/ ): "foo" == TRUE and "foo" == 0 but TRUE != 0 123 == "123foo" but "123" != "
201.
by magnat 9y ago
It's surprisingly slow process. Tens of seconds seem like ages in molecular physics. One could think an interaction between molecules should happen on a sub-nanosecond scale.
202.
by magnat 9y ago
Arduino (ATmega328) without additional boards does not have RTC nor any network connectivity. Using other microcontroller, such as ESP8266, one could fetch time from NTP, parse life expectancy tables from WWW, use GeoIP for checking which c
203.
by magnat 9y ago
After power failure, clock will be 0..10 minutes behind the schedule. If the value written to EEPROM was ahead of actual wall clock by half of timespan between writes (instead of current time), each restart would contribute -5..5 minutes of
204.
by magnat 9y ago
ATmega's EEPROM has a lifetime of 100k write/erase cycles. The program stores current time every 10 minutes, giving it ~2 years of lifetime. It looks like the clock will die long before you.
205.
by magnat 9y ago
Wouldn't using those tricks cause significant performance loss due to kernel syscall and page table updates needed for each virtual_alloc call?
206.
by magnat 9y ago
> This could happen if there’s disk corruption, a transient read failure, or a transient write failure caused bad data to be written. Wouldn't transient I/O error get corrected by block driver itself by repeating the request a
207.
by magnat 9y ago
It's not much of a kernel. More like a self-contained bare-metal application. Main goal of a kernel is to provide services to applications. Although starting coding right away and getting tangible results is somewhat rewarding, it woul
208.
by magnat 9y ago
Not directly related to the article, but string interpolation in code samples in step 6 looks somewhat unreadable without proper syntax coloring: Console.WriteLine($"lhs=({lhs.x}, {lhs.y}); rhs=({rhs.x}, {rhs.y})"); Console.
209.
by magnat 9y ago
That's the most neutral-point-of-view flight incident news article I've seen for quite some time. The whole site is so refreshingly level-headed.
210.
by magnat 9y ago
> The biggest step was eliminating the analog-to-digital converter that turns your voice into data. Instead, they took advantage of tiny vibrations that happen in a microphone when a person is talking into it, or a speaker when someone

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