wolf550e

38 ms·

391.
by wolf550e 7y ago
Probably https://en.wikipedia.org/wiki/BOR-4 which inspired https://en.wikipedia.org/wiki/HL-20_Personnel_Launch_System#... which became https://en.wikipedia.org/wiki/Dream_Ch
392.
by wolf550e 7y ago
You are correct (AFAIK) about the real military capability of the STS. But the Russians, when analyzing the program, came to the conclusion that the stated reason the shuttle was being developed was bogus. They believed that it would never
393.
by wolf550e 7y ago
http://www.satobs.org/seesat/Oct-2019/0100.html
394.
by wolf550e 7y ago
People ask why the people servicing it after landing (in the photos) are in hazmat suits. It's because of the hydrazine and N2O4.
395.
by wolf550e 7y ago
Almost all spacecraft (including satellites) use hydrazine (MMH, UDMH or Aerozine 50) for rotating around itself to keep pointing in the right direction (see attitude control, reaction control system). When used as a bi-propellant, hydrazin
396.
by wolf550e 7y ago
AES-128-CTR on my laptop is 4.8GB/sec per core. I'm sure something producing random enough output for simulation can be built that is as fast as memcpy, but would anything real be affected by the difference?
397.
by wolf550e 7y ago
Yes, it's a classic bug, also reminds me of https://mitls.org/pages/attacks/SMACK#skip
398.
by wolf550e 7y ago
Two separate issues: https://bugs.chromium.org/p/project-zero/issues/detail?id=19... webrtc data being handled before call answered, problematic in theory, Moxie can't get webrtc upstream to fix it ( htt
399.
by wolf550e 7y ago
Can downvoters explain why I'm wrong?
400.
by wolf550e 7y ago
Reading this [1] and then saying that maybe it's not a backdoor, maybe it's the NSA cryptographer's kids' birthdays is completely nuts. 1 - https://eprint.iacr.org/2016/376.pdf
401.
by wolf550e 7y ago
^ primary contact author of the paper in question Thank you for the explanation! In https://minerva.crocs.fi.muni.cz/#details-reasons and in your comment you're describing two bad ways to do scalarmult, but you do not
402.
by wolf550e 7y ago
Can you say whether libgcrypt did something especially stupid? [1] I understand that most people just take the ref10 code from supercop, but if I were to try to implement ed25519 from the paper ( https://ed25519.cr.yp.to/pape
403.
by wolf550e 7y ago
'tptacek would write that no reputable cryptographer believes the NIST curves themselves are backdoored.
404.
by wolf550e 7y ago
I think EdDSA desperately needs to be allowed in FIPS certified hardware, so that secure hardware will have support for EdDSA so that people who have to store keys in secure hardware will be able to use it. I mean HSMs, smart cards, secure
405.
by wolf550e 7y ago
previously: https://news.ycombinator.com/item?id=21136946
406.
by wolf550e 7y ago
1. They show libgcrypt managed to have the bug in EdDSA ( https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=c... ). 2. People need to use ECDSA for same reason they need to use RSA: compatibility. In particular,
407.
by wolf550e 7y ago
Elon Musk said 5% of SpaceX was working on Starship and that the hardware for crew would be ready this year (in interview to CNN after the QA he said October for in flight abort and November for DM-2).
408.
by wolf550e 7y ago
The benefits of standing up to high temperatures are important for reusable rockets that need to land (the heating happens on the way down, not on the way up). If you're not going to land, aluminum-lithium like Falcon 9 is better.
409.
by wolf550e 7y ago
https://en.wikipedia.org/wiki/Scott_Manley
410.
by wolf550e 7y ago
There are more efficient propellants than hydrolox, but extremely toxic [1]. With a bigger planet, we would have been forced to use either those or nuclear propulsion to get to space. 1 - https://space.stackexchange.com/ques
411.
by wolf550e 7y ago
Telling people what kind of questions are asked, or what topics are important is very different from telling people the specific questions and answers!
412.
by wolf550e 7y ago
https://twitter.com/SarahTaber_bww/status/117189565787294105...
413.
by wolf550e 7y ago
Change it to "made famous by Google". Do you have an example of a famous large system built out of many cheap computers (cheaper than normal servers) that predates Google?
414.
by wolf550e 7y ago
The io cctld authoritative dns servers are not very competently run. There have also been security issues like https://thehackerblog.com/the-io-error-taking-control-of-all... 'tptacek would add that a cctld that is und
415.
by wolf550e 7y ago
Then I don't understand. Which strategy is like the 737-max ? Banks generally don't build systems that crash and lose your money.
416.
by wolf550e 7y ago
Banks work because processes performed by humans that were developed before digital computers were invented, not because technology. They have logs of all transactions and are willing to reconcile them manually and are insured/lawyered
417.
by wolf550e 7y ago
Is that a single address space system or merely two systems with db2 databases and disk volumes on a SAN in replication? I think it's the latter. 100 miles will add 5ms (round trip) to your disk flush on commit. So a system like this h
418.
by wolf550e 7y ago
You are paying about 100x on hardware because your software is limited to a single address space. Even if the mainframe never goes down, the entire site will go down (eventually the rack power supply, HVAC, fiber, natural disaster, backhoe,
419.
by wolf550e 7y ago
No. If you need reliability and have money, separate commodity servers running a consistent (paxos or raft, not eventually consistent) in-memory database (the memory is a few terabytes) with logs to flash and to disaster recovery site will
420.
by wolf550e 7y ago
Should have been "... and save money on hardware (pioneered by Google) ..." but too late to edit now.

More ›