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/tech/ - Technology Anonymous 01/03/2016 (Sun) 17:52:28 [Preview] No. 125 [Reply]
Welcome to /tech/, a technology board. This board is for discussion of technology, both software and hardware.

Wiki: https://wiki.installgentoo.com/
IRC: #/tech/, #InfinityNow and #endchan on irc.rizon.net - https://qchat.rizon.net/

NSFW files are only allowed if they are spoilered. Tech support, consumer advice and desktop/ricing threads are all allowed for now.

All rules and policies are open for discussion in this thread.

You can view the logs in a less annoying way at https://8ch.tech/endlog/tech.html (available for all boards).

Related boards:
Edited last time by ring on 06/30/2016 (Thu) 01:50:02.
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Anonymous 12/18/2016 (Sun) 23:52:58 [Preview] No. 7684 del
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What if the user could enable all images to be spoilered if they are at work/class/outdoors or keep them unspoiled for at home. Additionally, when posting there could be an option to let spoiler anons know if the image is graphic. This could change the color of the spoiler or something to that effect.

Just a thought to give more options for the sake of compromise. Since an image can be questionable without being graphic.

Anonymous 12/19/2016 (Mon) 01:32:23 [Preview] No. 7688 del
That would be nice. Try suggesting it to StephenLynx.

Anonymous 12/19/2016 (Mon) 01:45:48 [Preview] No. 7689 del
I already suggested odili to implement media hiding and showed him that I implemented it on penumbralynx. Is up to someone add it to endchan's front-end now. You can see it working on http://spacechan.xyz

And the alternate spoiler is not practical. Re-spoiling anything is too fast and one should assume anything spoiler is almost guaranteed to be NSFW or graphical.

Anonymous 12/19/2016 (Mon) 01:46:51 [Preview] No. 7690 del
Tell the staff they would have to manually approve posts.

I am certain that no one would even consider the prospect of sitting and approving posts so the board could be used at all.

anal sex 01/05/2017 (Thu) 22:22:33 [Preview] No. 7788 del
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How do you do, Stallman?

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Anonymous 01/08/2017 (Sun) 21:04:28 [Preview] No. 7803 [Reply]
Someone is claiming that all files currently encrypted with OpenSSL have been salted to make them insecure:
2 posts omitted.

Email Anonymous 07/19/2016 (Tue) 03:36:37 [Preview] No. 5867 [Reply]
Is there a free email service that is better for privacy?

Like one headquartered in Iceland or something. I'm currently looking at openmailbox but registration was closed last time I checked.
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Anonymous 09/27/2016 (Tue) 18:15:40 [Preview] No. 6865 del
Thanks sempai. Will do.

bump Anonymous 01/19/2017 (Thu) 15:24:13 [Preview] No. 7871 del
hey endwall, your email server is not accessible.

Does someone else run Tor hidden service SMTP server? Also, what's up with Tor posting captcha?

Endwall 01/20/2017 (Fri) 04:17:09 [Preview] No. 7878 del
Try again. I set the mail server up on my main desktop (with my gui) as a test. I turn my computer off when I go to school. I was planning on migrating the mail server to a dedicated tor server computer but never got around to it. No one emails me anyways. I'll leave my computer on in text mode tomorrow, so you can send me something. I really think this is the answer, I mean not withstanding all the other security problems with computers.

Air gap with private key and public key ring for recipients-> encode message -> port encrypted message by floppy disc to transmision computer -> Send encrypted mail to tor mail server.

Recieve mail to tor mail server -> port encrypted message by floppy to airgapped decryption computer running in text mode. decrypt message read, in sealed room with multiple locks -> destroy traces of communication (reboot).

I think this would do it. That way you never type on the online computer, and only type and encrypt and decrypt on the air gapped computer. If both counterparties do this it should work.

Unfortunately I'm not currently doing this, my private key is also on my workstation. One day I'll impliment this strategy, probably this summer. If everyone did this protocol that would mess the NSA up big time. It wouldn't matter if your workstation was compromised, they still wouldn't get the message.

Anonymous 01/21/2017 (Sat) 09:02:00 [Preview] No. 7880 del

What about keeping your master key on an airgapped system and using subkeys instead of using floppy disks back and forth? You could avoid using floppies (an attack vector, albeit an uncommon one) altogether.

Endwall 01/21/2017 (Sat) 22:06:06 [Preview] No. 7881 del
No one emailed me on Friday.

I'll leave it up in text mode for the next two days and then return to my normal operations until i build my tor only mail server.


You still want to do the decrypts and encrypts on an airgap . Assume any computer connected to the internet has keylogging.

So if you want to use subkeys fine get a third computer. Two air-gapped computers and an online transmission computer.
Decrypt and Encrypt on the transmission computer means you may have given the content away. Coppying 100Kb text files back and forth and using jails is more safe than plugging in an RJ45 cable and typing on your keyboard.

Do it my way and you're home free. They'll need physical access to your full disk encrypted system or a virus that exfiltrates bit by bit. If you only copy the encrypted text file to the A:\ drive and write a checksum or some other verification method, and have reasonabley good security on your physical location I think this is the best way.

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Anonymous 06/25/2016 (Sat) 13:37:23 [Preview] No. 5510 [Reply]
I have a whole free week on my hands and i want to make most of it by installing a fresh new distro. Since i value /tech/'s opinion, tought i'd ask you guys.

Been using Linux Mint fot a year, but now i want a distro that is clean and not full of software i don't need (like Mint is). Can't decide between Debian or Arch, help me maybe? I kinda have a life, so if Arch is really that high maintenance, it's out of the picture.
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Anonymous 12/19/2016 (Mon) 14:55:46 [Preview] No. 7696 del
It's grand and critical, but it's no less grand and critical than the kernel.

You have a Unix-defying kernel, compiler, init system, C standard library, shell (usually), set of Unix utilities, windowing system, bootloader (usually), and then you complain about the init system going the same way?

Do you know the difference between the size of the Linux kernel and the original Unix kernel? Have you ever compared GNU code to Unix code?

Linux and GNU really, truly don't follow the Unix philosophy at all. They make up most of your system. Most other parts you could name (X11, Qt, KDE, OpenSSL, vim) don't follow it either.

Anonymous 12/22/2016 (Thu) 21:16:32 [Preview] No. 7720 del
As far as I'm concerned this is a non-problem. Just schedule it and it will do it automatically for you.

Anonymous 12/24/2016 (Sat) 11:27:50 [Preview] No. 7728 del
wow anon you really opened my eyes,
this writing style reminds me of that TP copypaster

Anonymous 01/19/2017 (Thu) 21:25:09 [Preview] No. 7876 del

is it really fair to compare LOC of linux(that runs on virtually anything relevent these days) to comfy days of PDP?

linux kernel code's quality VARIES.

For portion where linus himself and experienced devs invest most of their time tend to be high quality software with lots of technical gems.

It's just vendor specific parts where codes of rather questionable quality get introduced.

Small companies throwing in whatever crap that happens to compile and hipsters who wants title of 'linux developer' spoils community and ultimately, kernel itself.

Theo might be autist but at least he applies autism for better quality most of the time.

I'm not sure what's Linus' plan with kernel anymore...what is he trying to focus on with this dumpster fire.

Anonymous 01/20/2017 (Fri) 07:09:35 [Preview] No. 7879 del
Sure, Linux has reasons to be larger while sticking to the same philosophy, but not to this extent. It's also much larger because it's so filled with features. Its size is also the result of its very different design philosophy. And I don't think that's a bad thing, but I do think that it invalidates arguments that are just "this one other part of the system doesn't follow the unix philosophy either, therefore it's shit".

USSR home computer programs on tape Anonymous 01/18/2017 (Wed) 22:25:05 [Preview] No. 7863 [Reply]
Does anyone on /tech/ know how to get programs for old computer from audio cassette? What emulators can run that? Rips are on http://25dxotevqkqyhqgi.onion/

Anonymous 01/18/2017 (Wed) 22:52:41 [Preview] No. 7864 del
More info needed. An emulator may not be available for the architecture. Unless you already own the required machine?

Anonymous 01/19/2017 (Thu) 01:45:30 [Preview] No. 7867 del
You can record the audio to WAV files and it's not hard to convert to binary from what I'm told.

https://youtube.com/watch?v=_9SM9lG47Ew [Embed]

Anonymous 01/19/2017 (Thu) 12:36:28 [Preview] No. 7870 del
If it is 8 bit computer produced by USSR it might be Agat. Their early edition came with cassette tape reader.


The processor of Agat was clone of MOS 6052 so you might want to check out emulators written for it.



Anonymous 01/19/2017 (Thu) 21:15:05 [Preview] No. 7875 del

but even if you dump the programs encoded in cassette it would be bunch of boring games and programming utilities.

Anonymous 08/07/2016 (Sun) 16:15:07 [Preview] No. 6120 [Reply]
BSD Thread.

Let's have a thread about the permissive, copyleft style of operating systems known as BSD.

Discussion of Free,Net,Open,Dragonfly,Edge *BSD is welcome!

Linux and FSF users who would rather complain about licencing and that linux is better need not apply.


FreeBSD Quarterly Status Report: https://www.freebsd.org/news/status/report-2016-04-2016-06.html

Vulns found in freebsd-update and portsnap: https://lists.freebsd.org/pipermail/freebsd-security/2016-July/009016.html

OpenSSH 7.3 Released: http://www.openssh.com/txt/release-7.3

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Anonymous 01/16/2017 (Mon) 07:18:12 [Preview] No. 7848 del
LibertyBSD looks like an interesting project


Anonymous 01/16/2017 (Mon) 17:48:16 [Preview] No. 7851 del
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if you are not intel employee who can review and compile microcodes DO NOT BUY hardwares that require said microcodes to function properly.

said microcodes DO NOT EXECUTE in kernel privilege and they DO NOT fuck with kernel data structure.

they run INSIDE your shitty hardware. OpenBSD kernel READS said microcode and LOADS it inside your shitty hardware's INTERNAL MEMORY which is then EXECUTED BY your shitty hardware's OWN shitty processor.

non libre LINUX kernel ships with BINARY ONLY drivers that RUNS with KERNEL PRIVILEGE and said microcodes.

OpenBSD kernel DOES NOT ship with BINARY ONLY drivers.

Anonymous 01/17/2017 (Tue) 20:09:01 [Preview] No. 7861 del
What about hardened BSD on laptop?

Anonymous 01/19/2017 (Thu) 21:03:05 [Preview] No. 7874 del

it's still based on freebsd so suspend/resume and other quality of life features won't be available.

For daily driver OpenBSD laptops might be better.


crypto fails meta thread Anonymous 01/17/2017 (Tue) 01:31:24 [Preview] No. 7855 [Reply]

curve25519-donna implementation by google is susceptible to timing attack as MSVC runtime's 64bit multiplication is nonconstant time operation in x86 environment.

Anonymous 01/17/2017 (Tue) 01:41:22 [Preview] No. 7856 del

Anonymous 01/17/2017 (Tue) 01:44:03 [Preview] No. 7857 del

openssl command line's enc kdf is WEAK

Anonymous 01/17/2017 (Tue) 02:23:57 [Preview] No. 7858 del

Exposing HashMap's iteration order can cause O(n²) blowup even in innocent-looking code without the presence of an attacker.

In the presence of an attacker, access to the order of a dictionary allows HashDoS-like attacks with only two requests in common scenarios.

Anonymous 01/19/2017 (Thu) 20:54:17 [Preview] No. 7873 del
not story of failure but food for thought


Mining bitcoin with SAT solvers.

i0ne Pre-Induction i0ne 01/19/2017 (Thu) 01:03:54 [Preview] No. 7865 [Reply]

We are i0ne. We are a Security Penetration Team. Our goal is simple, we intend to expose the flaws of modern security procedures within this world of anonymity.

The lies that you have been told about being secured and safe from malicious persons will be revealed. You have been fed with lies...lies like social media and mainstream media websites such as Facebook, YouTube, CNN, and FOX News. These websites and corporations use you for revenue. They lie to you for their own gain.

They lie about Politics, Security, and News overall. This is absolutely despicable, and scummy. Multimillion Dollar Companies have lied to their users for decades, and it will not stop.

Nothing is secure, not even your personal information. We encourage you to believe these blatant lies, only to be proven otherwise.

If you are interested in induction into i0ne, please email us at i0neCONTACT@protonmail.ch

Anonymous 01/19/2017 (Thu) 01:31:09 [Preview] No. 7866 del
duh... are you new here?

Anonymous 01/19/2017 (Thu) 09:01:10 [Preview] No. 7868 del
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Anonymous 01/19/2017 (Thu) 16:05:55 [Preview] No. 7872 del
>. Our goal is simple, we intend to expose the flaws of modern security procedures within this world of anonymity.

Are you guys behind the spam war with /intg/

Anonymous 01/19/2017 (Thu) 21:49:03 [Preview] No. 7877 del
giff me 0 day poc || gtfo

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Webm thread Anonymous 05/23/2016 (Mon) 23:08:37 [Preview] No. 3991 [Reply]
Post your /tech/ related webms
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Anonymous 06/30/2016 (Thu) 22:55:28 [Preview] No. 5679 del

Anonymous 01/09/2017 (Mon) 16:00:16 [Preview] No. 7810 del
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(3.85 MB 1280x720 watchdogs.webm)
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Anonymous 01/09/2017 (Mon) 16:09:45 [Preview] No. 7811 del
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Anonymous 01/16/2017 (Mon) 08:41:00 [Preview] No. 7849 del

Anonymous 01/18/2017 (Wed) 05:07:12 [Preview] No. 7862 del
kek on that last one

DIY, Modular, Open source Laptop Anonymous 01/03/2017 (Tue) 09:21:19 [Preview] No. 7768 [Reply]
Laptop form factor open source hardware design, built from off the shelf components for DIY, modular, open source computing.

CPU, RAM, graphics: 1x single board computer
FSB, ports: 2x powered USB hub
Battery: 1x USB powerbank, >5000 mAh, >2A
Input: 1x USB keyboard
Input: 1x USB trackpad
Storage: 1x USB flash drive
Network: 1x USB WiFi dongle
Audio: 1x USB sound card/headset
Display: 1x USB powered HDMI monitor
Case: 3D printed or DIY glued wooden case

-Completely modular, customizable, upgradeable and repairable
-User serviceable by all users
-Universal, modular battery and charger. Can swap battery when depleted

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Anonymous 01/11/2017 (Wed) 11:34:17 [Preview] No. 7819 del
>muh intel

I am typing this very post in shitty Chinese board based chromebook so what are you trying to prove?

that you never worked on arm devices?



>muh usb runs fasta than copper substrate

usb sends command and control data through same line.

You can't have 480 Mbps purely for data. at maximum it would be something between 400 Mbps to 300 Mbps (for usb 2.0) for SINGLE connection at BEST(i.e. it's still theoretical value).

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Anonymous 01/11/2017 (Wed) 11:50:42 [Preview] No. 7820 del
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>There are several reasons why your device will never be able to use all of this bandwidth. First of all, the USB bus is shared among several users. Even if you are plugged into different ports on the motherboard, you are probably sharing the same host controller as all of the other devices on the bus, so your device is sharing the USB bus bandwidth with all of the other devices.

>Second, USB is a packetized protocol where longer blocks of data are divided into 512-byte packets. Each packet contains a header identifying the packet contents, and a CRC at the end of the packet for data integrity. Each packet also requires an ACK from the other side of the link. Start of Frame (SOF) packets are sent every 125 uSec (microframe) to maintain timing on the bus. The net effect of this is that the theoretical maximum bandwidth of USB is 13 bulk packets per microframe, or 53,248,000 bytes/second. Even this limit is not achievable with current host controllers, which can receive 10 bulk packets/microframe or send 8 bulk packets/microframe.

>500mA – This is the absolute maximum power allowed under the USB spec

don't listen to haters op!

bright future awaits you!

Anonymous 01/12/2017 (Thu) 16:08:24 [Preview] No. 7825 del
There are also x86 SBCs out there. Many of them also have LVDS connector for display, which opens up some options with used panels from laptop PCs (although I'm not sure everything is compatible).

Just look into embedded pico-ITX

I want to build a UMPC with Pentium N 3710 (Braswell) based pico-ITX board. Although this would be relatively expensive it has a much more capable GPU than any of the ARM stuff out there. x86 and real OpenGL/DirectX acceleration should make a lot of neat things simple to achieve.

Also for rapid prototyping of enclosure, forget wood unless you're really good at working with that. Look into Sintra PVC foam board. I've worked with it in the past as enclosures for power supplies and other projects. That was with 6mm thick sheets. Really easy to work with, does not take a lot of tools. You basically would want a T-Square or Triangle and some sharp knife or razor to score with then break it. Anywhere that you need to attach a component through a screw hole you would just drill a very small pilot hole and use a small wood screw. The PVC foam board can be glued together with a wide variety of adhesives but thin cyanoacrylate works better than most. That's just regular super glue.

I'm probably going with 3mm this time considering the UMPC will be small I think that's sufficient, although it will be built in layers that are glued together, thicker than 3mm in many spots.

If done properly this could have excellent results and be achievable without spending a lot of time learning 3D modeling or CAD. Or having to spend all that time designing a 3D model and send it off for printing not quite 100% sure if it's going to all fit together just right.

I'm still looking for a good option for the hinges, friction hinges can be surprisingly expensive.

Anonymous 01/12/2017 (Thu) 16:13:40 [Preview] No. 7826 del
A few companies that manufacture and sell x86 pico-ITX SBCs (and have prices and ordering available on their site):

(Israeli company, but if you're buying Intel that's irrelevant)

(DFI is a Taiwanese company that has always made very high quality motherboards. They used to be famous for excellent gaming motherboards during the socket 939 era, but these days focus on industrial and embedded stuff)

Anonymous 01/17/2017 (Tue) 08:58:36 [Preview] No. 7860 del
Specifications for >>7814
CPU: 1 Ghz A31S ARM Cortex-A7 Quad-Core
GPU: PowerVR SGX544MP2
Display: M155 GAEMS 15.5" LED TN LCD, 1366 x 768
Network: 10/100/1000 Ethernet, WiFi 802.11b/g/n
Battery length: 5 hours (10000 mAh @ 10 W)
Ports: 7x USB 2.0, 2x 3.5mm Audio output, 1x 3.5mm Audio input, 1x HDMI
Weight: <2 kg
Dimensions: 38cm x 24cm x 3cm (folded)
Total cost: $254.99

>I am typing this very post in shitty Chinese board based chromebook so what are you trying to prove?

If you used the linked chipset, then with nonfree wireless and video drivers?

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