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seriously how does a magnet lose its magnetness
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Jul 24, 2017 05:43
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maskenfreiheit posted:seriously how does a magnet lose its magnetness ferromagnetization is a phase, like solid or liquid phases in water actually physicists study ideal magnetization when they want to study phase transitions w/o actually studying real stuff (spin glasses, ising model, etc) the metal goes away from the phase to the other phase heat helps the process along
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Jul 24, 2017 05:48
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curufinor posted:ferromagnetization is a phase, like solid or liquid phases in water so maybe being inside a 98.6° human is bad for the magnets? 🤔
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Jul 24, 2017 05:50
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maskenfreiheit posted:so maybe being inside a 98.6° human is bad for the magnets? 🤔
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Jul 24, 2017 05:52
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maskenfreiheit posted:so maybe being inside a 98.6° human is bad for the magnets? 🤔 Nah, I'm sure it's fine. Now, for those chips they're implanting, I'm assuming it's no different from the NFC chip in my debit card? Any estimates for time to failure in a use like this?
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Jul 24, 2017 05:53
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Real cyborg implants range from poo poo like mine - you literally have to hold the programmer to my head and even if you stick me in a MRI to wipe it or manage to gently caress with the programming it just fails to an uncomfortable safe setting - to poo poo you can hack remotely from basically anywhere because they run pretty much Android and fail unsafe to boot. By comparison sticking a magnet inside your finger is just kinda dumb and not a massive secfuck. EDIT: I have a cyberskull.
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Jul 24, 2017 05:54
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https://www.youtube.com/watch?v=tVVTSXA0HTU
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Jul 24, 2017 06:00
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Avenging_Mikon posted:Nah, I'm sure it's fine. it is potentially a secfuck, despite what Subjunctive believes, because reading nfc from a distance is a fun trick people like to do for fun, and sitting out in the parking lot of that building is way easier than hanging out at the international terminal at your airport why is this video 1080p but like 5fps anthonypants fucked around with this message at 06:07 on Jul 24, 2017 |
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Jul 24, 2017 06:05
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maskenfreiheit posted:seriously how does a magnet lose its magnetness any piece of iron will have a bunch of 'magnetic domains' (3d chunks where the magnetic field lines up) in it, it's just that generally they all point in random directions. in a magnet they point in the same direction. i guess that over time they slip out of alignment, and heat speeds up the process.  vOv fucked around with this message at 06:14 on Jul 24, 2017 |
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Jul 24, 2017 06:10
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vOv posted:any piece of iron will have a bunch of 'magnetic domains' (3d chunks where the magnetic field lines up) in it, it's just that generally they all point in random directions. in a magnet they point in the same direction. i guess that over time they slip out of alignment, and heat speeds up the process.
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Jul 24, 2017 06:12
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vOv posted:any piece of iron will have a bunch of 'magnetic domains' (3d chunks where the magnetic field lines up) in it, it's just that generally they all point in random directions. in a magnet they point in the same direction. i guess that over time they slip out of alignment, and heat speeds up the process. phase transitions have a discontinuity of some kind associated with them. they can get categorized into different categories depending on the nature of this discontinuity. in the familiar water->ice or phase transition, the density is discontinuous: such and such a density for water, then BAM ICE. that's called a first order phase transition magnets are a second order phase transition. so as you heat it up the magnetization goes to zero at the curie temperature, but smoothly. however, the magnetic susceptability (derivative of magnetization) has the discontinuity (hence the name, second order). there are also related phenomena where the correlation decay with the system states gently caress up and hysteresis and all sorts of poo poo happen hysteresis is basically the fancyass physics term for memory so the way they are given to point in the same direction is you just whango a bigass magnet over them at the critical point (curie temp), then cool em back down. it's because ferromagnetism is a second order phase transition that the magnet can thereafter keep the state it's in your spinny spinny hard drive works by doing that in a very very small manner, which is why if you boil your hard drives in molten salt they don't do hard drive stuff anymore. or you can get a way bigger magnet like the scary bald meth man in breaking bad and kill hdds that way
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Jul 24, 2017 06:30
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maskenfreiheit posted:http://kstp.com/news/wisconsin-company-to-implant-microchips-in-employees-three-square-market/4549459/ so is "break room market" some kind of fancy dressed up investor storytime version of "vending machine"
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Jul 24, 2017 06:36
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ate all the Oreos posted:so is "break room market" some kind of fancy dressed up investor storytime version of "vending machine" picture the Togo meals from Suckerberg's cafeteria but you have to pay for them it's basically the wall of refrigerated sandwiches from 7/11
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Jul 24, 2017 06:39
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endlessmonotony posted:Real cyborg implants range from poo poo like mine - you literally have to hold the programmer to my head and even if you stick me in a MRI to wipe it or manage to gently caress with the programming it just fails to an uncomfortable safe setting - to poo poo you can hack remotely from basically anywhere because they run pretty much Android and fail unsafe to boot. What happened to your 💀?
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Jul 24, 2017 08:58
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endlessmonotony posted:Real cyborg implants range from poo poo like mine - you literally have to hold the programmer to my head and even if you stick me in a MRI to wipe it or manage to gently caress with the programming it just fails to an uncomfortable safe setting - to poo poo you can hack remotely from basically anywhere because they run pretty much Android and fail unsafe to boot. do u have a skul gun?
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Jul 24, 2017 10:00
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maskenfreiheit posted:so maybe being inside a 98.6° human is bad for the magnets? 🤔 getting slammed around a few hundred times a day because it's a tiny magnet in the fingertip of a touch typing nerd is probably a deciding factor
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Jul 24, 2017 13:15
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anthonypants posted:nfc isn't going to fail inside your body unless you are actually a mutant and grow callouses that block rf signals the ones used in pets and other animals last multiple decades. they also afaik are extremely simple inductively coupled devices with hard coded ID numbers and zero authentication. the inductive coupling makes it hard to overload and the simple data structure doesn't take a fancy chip that could be hiding fun security vulnerabilities. maskenfreiheit posted:I have a friend who's an employment nah. you can't even require employees to use biometrics like hard scanning for ID without running into religious discrimination issues. requiring an implant would be completely off limits.
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Jul 24, 2017 13:18
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Shifty Pony posted:they also afaik are extremely simple inductively coupled devices with hard coded ID numbers and zero authentication. the inductive coupling makes it hard to overload and the simple data structure doesn't take a fancy chip that could be hiding fun security vulnerabilities. yes my dog's name is Fido, 300 hundred letter js, then \x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80
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Jul 24, 2017 13:22
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Shifty Pony posted:nah. you can't even require employees to use biometrics like hard scanning for ID without running into religious discrimination issues. requiring an implant would be completely off limits. "looking at your hand with a computer is exactly the same as marking your hand with the sign of a metaphor for pagan faiths" - a the correct argument of "surrendering personal autonomy is not a prerequisite for employment in any sane situation", however, works just fine flakeloaf fucked around with this message at 13:29 on Jul 24, 2017 |
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Jul 24, 2017 13:26
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maskenfreiheit posted:http://kstp.com/news/wisconsin-company-to-implant-microchips-in-employees-three-square-market/4549459/ By the sound of it the chip is just one of the RFID ones you put in your pet. Iirc the newer ones are clone proof, more or less, so there's no real security problem here, just every other loving thing with the idea is terrible.
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Jul 24, 2017 13:37
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goddamnedtwisto posted:By the sound of it the chip is just one of the RFID ones you put in your pet. Iirc the newer ones are clone proof, more or less, so there's no real security problem here, just every other loving thing with the idea is terrible. what does clone proof mean?
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Jul 24, 2017 13:42
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Shinku ABOOKEN posted:what does clone proof mean? probably has a challenge/response of some flavor with central verification so you can't just read it once and make a new one
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Jul 24, 2017 13:47
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mixture of write-once memory, challenge/response restricted memory and the restricted setting of the hardware itself so physical tampers aren't a real concern (re: cloning specifically)
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Jul 24, 2017 13:51
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goddamnedtwisto posted:By the sound of it the chip is just one of the RFID ones you put in your pet. Iirc the newer ones are clone proof, more or less, so there's no real security problem here, just every other loving thing with the idea is terrible. does getting an infection from a piece of metal rubbing around count? if a tiny hair in my taint can cause so many problems I can't see why metal couldn't also
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Jul 24, 2017 14:03
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aw the new guy at my office still thinks it's illegal to export public key cryptography with key lengths longer than 512 bits, that's adorable 
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Jul 24, 2017 14:27
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maskenfreiheit posted:does getting an infection from a piece of metal rubbing around count? yeah that's a good point I'm sure that nobody who works on chipping pets or wage slaves has ever thought about
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Jul 24, 2017 14:34
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anthonypants posted:microsoft will officially block emet in the fall windows 10 update https://support.microsoft.com/en-us/help/4034825/features-that-are-removed-or-deprecated-in-windows-10-fall-creators-up I don't get this. They're making a big deal about how they're baking the security features in to the core OS now so you don't need EMET, but its all process opt-in stuff. ASLR? Opt-in. SafeSEH? Opt-In. Control Flow Guard? Opt-in. DEP/Nx? Opt-in. SEHOP? Opt-in. Code signing? Opt-in. You're a gigantic company that prides itself of maintaining backwards compatibility with everything and devs suck rear end so this stuff isn't going to get used consistently outside of you and maybe a handful of shops. If this was Apple and you were willing to make a clean break and throw errors every time the old stuff tried to run then this would make sense but instead they loving up the security of their product for anyone who gives a drat and you don't need to look any further than that stupid FragRAT thing in the source engine last week to see something that would have been trivial to block with ASLR/DEP but noooooope not even Valve can consistently compile their poo poo with the right options.
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Jul 24, 2017 14:36
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Daman posted:it's only deprecated in that patch because WD exploit guard reaches feature parity then, probably. exploit guard is poo poo and leaves a massive gap. Microsoft are fuckers.
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Jul 24, 2017 14:39
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ate all the Oreos posted:aw the new guy at my office still thinks it's illegal to export public key cryptography with key lengths longer than 512 bits, that's adorable in the 90s my dad took me to the bookstore with him to buy the PGP book with the source code in it because he thought it was important that encryption wasn't treated like munitions.
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Jul 24, 2017 14:49
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anthonypants posted:nfc isn't going to fail inside your body unless you are actually a mutant and grow callouses that block rf signals Did you really take Subjunctives joke quoting "it doesn't have GPS tracking" as a serious defense of the technology?
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Jul 24, 2017 14:57
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yeah, the joke is the guy's response in the article to "security concerns" was to blurt out "it doesn't have GPS tracking!" out of nowhere, as if that's the only possible problem
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Jul 24, 2017 15:00
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BangersInMyKnickers posted:DEP/Nx? Opt-in. just for the record, you can turn DEP on for all processes with bcdedit, either allowing processes to opt out (I think this may be the default setting on windows server?) or forcing it always on. don't think you can set any of the other settings you mentioned though also the steam client is terrible so lmao at "not even valve" Bonfire Lit fucked around with this message at 15:10 on Jul 24, 2017 |
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Jul 24, 2017 15:06
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Bonfire Lit posted:just for the record, you can turn DEP on for all processes with bcdedit, either allowing processes to opt out (I think this may be the default setting on windows server?) or forcing it always on. don't think you can set any of the other settings you mentioned though You can only put DEP in to Opt-Out mode with the native controls, which allows any of the processes to not use it, and a surprising amount of them do this in my experience. There aren't GPOs for this, the admin template for EMET is what gives you control of these settings, so you're manually flipping poo poo in the registry to do it. EMET also gives you an easy method to opt-in/opt-out specific features for security or compatibility issues. What they are giving you now makes you manually define a bit mask to control the features. It's a real bag of poo poo.
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Jul 24, 2017 15:12
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flakeloaf posted:the correct argument of "surrendering personal autonomy is not a prerequisite for employment in any sane situation", however, works just fine probably, but that's not legally protected whereas being a religious nutter is
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Jul 24, 2017 15:15
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anthonypants posted:it is potentially a secfuck, despite what Subjunctive believes, because reading nfc from a distance is a fun trick people like to do for fun wait what how did I get involved in this?
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Jul 24, 2017 15:25
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lmao that 1. The company had a rebuttal ready to rules lawyer the Bible so ppl can use the scanner and 2. They thought it would make a difference to crazy fundies who already don't trust anyone but Pastor Rick down t'tha Bible college because something something of the world something something unequally yoked
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Jul 24, 2017 15:30
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flakeloaf posted:yes my dog's name is Fido, 300 hundred letter js, then \x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80 Who's a good boy? You are, ';drop database;-- ,you are!
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Jul 24, 2017 15:55
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Sereri posted:Who's a good boy? You are, ';drop database;-- ,you are! i will never partition with you, *
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Jul 24, 2017 15:56
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Hi my name is %s %s %s %s %s %s %s
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Jul 24, 2017 16:16
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people often use pet names as passwords, which is bad due to low entropy the obvious solution is to name your pet a long string consisting of uppercase letters, lowercase letters, numbers, and symbols
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Jul 24, 2017 16:26
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