Gynvael Coldwind
@gynvael.bsky.social
Security researcher/programmer ⁂ Managing director @ HexArcana ⁂ @DragonSectorCTF founder ⁂ he/him
Pinned
Paged Out!
Deeply technical zine. And it's free.
pagedout.institute
𝙿𝙰𝙶𝙴𝙳 𝙾𝚄𝚃! #𝟾 𝙳𝙴𝙰𝙳𝙻𝙸𝙽𝙴: 𝟺 𝙹𝚊𝚗𝚞𝚊𝚛𝚢 𝟸𝟶𝟸𝟼 𝙴𝚘𝙳 𝙴𝚘𝙰
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
Glitches in games, especially used for speedrunning, are one of the most fun aspects of hacking to watch!
As an example, check out this video "How Speedrunners BEAT Hollow Knight Silksong In 10 Minutes!" by Abyssoft
www.youtube.com/watch?v=M6Jn...
As an example, check out this video "How Speedrunners BEAT Hollow Knight Silksong In 10 Minutes!" by Abyssoft
www.youtube.com/watch?v=M6Jn...
How Speedrunners BEAT Hollow Knight Silksong In 10 Minutes!
YouTube video by Abyssoft
www.youtube.com
December 30, 2025 at 7:31 AM
Glitches in games, especially used for speedrunning, are one of the most fun aspects of hacking to watch!
As an example, check out this video "How Speedrunners BEAT Hollow Knight Silksong In 10 Minutes!" by Abyssoft
www.youtube.com/watch?v=M6Jn...
As an example, check out this video "How Speedrunners BEAT Hollow Knight Silksong In 10 Minutes!" by Abyssoft
www.youtube.com/watch?v=M6Jn...
Ah Saturday morning! What a great time to...
...write a 1-page article for Paged Out! zine!
Deadline is 4th Jan - just a week away.
CFP: pagedout.institute?page=cfp.php
...write a 1-page article for Paged Out! zine!
Deadline is 4th Jan - just a week away.
CFP: pagedout.institute?page=cfp.php
Paged Out!
Deeply technical zine. And it's free.
pagedout.institute
December 27, 2025 at 8:49 AM
Ah Saturday morning! What a great time to...
...write a 1-page article for Paged Out! zine!
Deadline is 4th Jan - just a week away.
CFP: pagedout.institute?page=cfp.php
...write a 1-page article for Paged Out! zine!
Deadline is 4th Jan - just a week away.
CFP: pagedout.institute?page=cfp.php
𝙿𝙰𝙶𝙴𝙳 𝙾𝚄𝚃! #𝟾 𝙳𝙴𝙰𝙳𝙻𝙸𝙽𝙴: 𝟺 𝙹𝚊𝚗𝚞𝚊𝚛𝚢 𝟸𝟶𝟸𝟼 𝙴𝚘𝙳 𝙴𝚘𝙰
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
Paged Out!
Deeply technical zine. And it's free.
pagedout.institute
December 9, 2025 at 10:29 AM
𝙿𝙰𝙶𝙴𝙳 𝙾𝚄𝚃! #𝟾 𝙳𝙴𝙰𝙳𝙻𝙸𝙽𝙴: 𝟺 𝙹𝚊𝚗𝚞𝚊𝚛𝚢 𝟸𝟶𝟸𝟼 𝙴𝚘𝙳 𝙴𝚘𝙰
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
Save the date if you're planning to write an article or showcase your digital art in the next issue of our magazine.
pagedout.institute
P.S. We're looking for sponsors for issue #8 as well.
One of my favorite projects just hit a HUGE milestone of 1 million downloads!
Kudos to the team and everyone who supported us!
Kudos to the team and everyone who supported us!
You did it! By reading Paged Out!, you helped us cross ONE MILLION total downloads! 🥳 Thank you!
pagedout.institute?page=issues....
pagedout.institute?page=issues....
Paged Out!
Deeply technical zine. And it's free.
pagedout.institute
December 5, 2025 at 10:02 AM
One of my favorite projects just hit a HUGE milestone of 1 million downloads!
Kudos to the team and everyone who supported us!
Kudos to the team and everyone who supported us!
You can write '2' (0x32) anywhere in the filesystem of a Linux-based network switch. How do you get root?
That's basically what my talk at GreHack conference was about - enjoy!
youtu.be/F4CudbWHZ7Y?...
youtu.be/X-ZJH4d2tuE?...
That's basically what my talk at GreHack conference was about - enjoy!
youtu.be/F4CudbWHZ7Y?...
youtu.be/X-ZJH4d2tuE?...
GreHack 2025 Live Stream Minatec
YouTube video by GreHack
youtu.be
November 30, 2025 at 9:56 AM
You can write '2' (0x32) anywhere in the filesystem of a Linux-based network switch. How do you get root?
That's basically what my talk at GreHack conference was about - enjoy!
youtu.be/F4CudbWHZ7Y?...
youtu.be/X-ZJH4d2tuE?...
That's basically what my talk at GreHack conference was about - enjoy!
youtu.be/F4CudbWHZ7Y?...
youtu.be/X-ZJH4d2tuE?...
With the newest Black Alps 2025 and GreHack 2025 additions, my printed Paged Out! collection is slowly growing!
November 29, 2025 at 9:05 AM
With the newest Black Alps 2025 and GreHack 2025 additions, my printed Paged Out! collection is slowly growing!
pagedout.institute ← Call for articles & art for issue #8 of this technical IT zine is open! As usual, we accept 1-page articles about everything interesting in IT and related fields (be it programming, cybersec, AI, demoscene, retro, electronics, etc).
Paged Out!
Deeply technical zine. And it's free.
pagedout.institute
November 24, 2025 at 9:23 AM
pagedout.institute ← Call for articles & art for issue #8 of this technical IT zine is open! As usual, we accept 1-page articles about everything interesting in IT and related fields (be it programming, cybersec, AI, demoscene, retro, electronics, etc).
Here's some blursed Python code for you:
a, b, c = {"alice", "has", "a cat"}
print(a, b, c)
a, b, c = {"alice", "has", "a cat"}
print(a, b, c)
November 12, 2025 at 5:35 PM
Here's some blursed Python code for you:
a, b, c = {"alice", "has", "a cat"}
print(a, b, c)
a, b, c = {"alice", "has", "a cat"}
print(a, b, c)
Here's a Saturday Python 3 Puzzle for you:
November 8, 2025 at 9:59 AM
Here's a Saturday Python 3 Puzzle for you:
If you've liked my "Linux Terminal: CTRL+D is like pressing ENTER" article (hackarcana.com/article/ctrl...), be sure to checkout @mina86.com's "Is Ctrl+D really like Enter?" (mina86.com/2025/is-ctrl...) :)
Is Ctrl+D really like Enter? — mina86.com
mina86.com
November 5, 2025 at 11:41 AM
If you've liked my "Linux Terminal: CTRL+D is like pressing ENTER" article (hackarcana.com/article/ctrl...), be sure to checkout @mina86.com's "Is Ctrl+D really like Enter?" (mina86.com/2025/is-ctrl...) :)
Heeey, ncurses/terminfo has a small virtual machine! And if there's a VM, there are CTF challenges :)
hackarcana.com/public-exerc...
hackarcana.com/public-exerc...
(third one coming next week, will be a bit harder)
hackarcana.com/public-exerc...
hackarcana.com/public-exerc...
(third one coming next week, will be a bit harder)
November 1, 2025 at 4:15 PM
Heeey, ncurses/terminfo has a small virtual machine! And if there's a VM, there are CTF challenges :)
hackarcana.com/public-exerc...
hackarcana.com/public-exerc...
(third one coming next week, will be a bit harder)
hackarcana.com/public-exerc...
hackarcana.com/public-exerc...
(third one coming next week, will be a bit harder)
We've received 50 required articles for issue #7 of
@pagedout.bsky.social - this means we're publishing the issue in the few next weeks.
1. Want to get an article in #7? You should write it now and send it in in the next few days.
2. We're still looking for more issue sponsors!
@pagedout.bsky.social - this means we're publishing the issue in the few next weeks.
1. Want to get an article in #7? You should write it now and send it in in the next few days.
2. We're still looking for more issue sponsors!
September 9, 2025 at 8:02 AM
We've received 50 required articles for issue #7 of
@pagedout.bsky.social - this means we're publishing the issue in the few next weeks.
1. Want to get an article in #7? You should write it now and send it in in the next few days.
2. We're still looking for more issue sponsors!
@pagedout.bsky.social - this means we're publishing the issue in the few next weeks.
1. Want to get an article in #7? You should write it now and send it in in the next few days.
2. We're still looking for more issue sponsors!
OK, ChatGPT 5 admittedly surprised me in a positive way. I threw a PNG with a (small) Python AST graph at it and told it to reverse it to Python code, and it successfully did that. I have expected it to fail hard, but here we are 🤷.
September 2, 2025 at 8:40 AM
OK, ChatGPT 5 admittedly surprised me in a positive way. I threw a PNG with a (small) Python AST graph at it and told it to reverse it to Python code, and it successfully did that. I have expected it to fail hard, but here we are 🤷.
Friendly reminder that order of operations makes a difference... more so than you think ;)
August 11, 2025 at 10:06 AM
Friendly reminder that order of operations makes a difference... more so than you think ;)
Lulu (print on demand) is increasing prices by 5% from Aug 1st, so if you were thinking of getting @pagedout.bsky.social #6 there, do it now: www.lulu.com/search?page=...
Shop the Independent Bookstore | Lulu
www.lulu.com
July 10, 2025 at 6:49 AM
Lulu (print on demand) is increasing prices by 5% from Aug 1st, so if you were thinking of getting @pagedout.bsky.social #6 there, do it now: www.lulu.com/search?page=...
[Please share with people outside of cybersec]
Do you have a horror story when you had to deal with cybersecurity companies / people? This is your chance to vent! → forms.gle/9aX24HrfnEQm...
I'm running an anonymous survey to listen to stories and look into the disconnect we sometimes have.
Do you have a horror story when you had to deal with cybersecurity companies / people? This is your chance to vent! → forms.gle/9aX24HrfnEQm...
I'm running an anonymous survey to listen to stories and look into the disconnect we sometimes have.
Frustration with cybersecurity people and companies
This anonymous survey if for people who are NOT working in cybersecurity and who had to contract people / buy services / buy products from companies in cybersecurity / use cybersecurity products / etc...
forms.gle
July 5, 2025 at 9:58 AM
[Please share with people outside of cybersec]
Do you have a horror story when you had to deal with cybersecurity companies / people? This is your chance to vent! → forms.gle/9aX24HrfnEQm...
I'm running an anonymous survey to listen to stories and look into the disconnect we sometimes have.
Do you have a horror story when you had to deal with cybersecurity companies / people? This is your chance to vent! → forms.gle/9aX24HrfnEQm...
I'm running an anonymous survey to listen to stories and look into the disconnect we sometimes have.
Yet another ZIP trick...
hackarcana.com/article/yet-...
+ a hands on exercise if you want to try this yourself:
hackarcana.com/article/yet-...
hackarcana.com/article/yet-...
+ a hands on exercise if you want to try this yourself:
hackarcana.com/article/yet-...
July 2, 2025 at 11:57 AM
Yet another ZIP trick...
hackarcana.com/article/yet-...
+ a hands on exercise if you want to try this yourself:
hackarcana.com/article/yet-...
hackarcana.com/article/yet-...
+ a hands on exercise if you want to try this yourself:
hackarcana.com/article/yet-...
A (not so) short analysis of anonymization schema used in the "Discord Unveiled" paper: hackarcana.com/article/anon...
May 23, 2025 at 12:38 PM
A (not so) short analysis of anonymization schema used in the "Discord Unveiled" paper: hackarcana.com/article/anon...
Poll! What ANSI color types does your terminal support?
"\x1b[1;31m3bpp+attr\x1b[m \x1b[91m4bpp\x1b[m \x1b[38:5:196m8bpp\x1b[m \x1b[38;2;255;0;0m24bpp\x1b[m"
Reply with screenshot of the output of this string + add OS/terminal versions
E.g. Ubuntu 24.04.2LTS, Konsole 23.08.5
"\x1b[1;31m3bpp+attr\x1b[m \x1b[91m4bpp\x1b[m \x1b[38:5:196m8bpp\x1b[m \x1b[38;2;255;0;0m24bpp\x1b[m"
Reply with screenshot of the output of this string + add OS/terminal versions
E.g. Ubuntu 24.04.2LTS, Konsole 23.08.5
May 16, 2025 at 6:46 AM
Poll! What ANSI color types does your terminal support?
"\x1b[1;31m3bpp+attr\x1b[m \x1b[91m4bpp\x1b[m \x1b[38:5:196m8bpp\x1b[m \x1b[38;2;255;0;0m24bpp\x1b[m"
Reply with screenshot of the output of this string + add OS/terminal versions
E.g. Ubuntu 24.04.2LTS, Konsole 23.08.5
"\x1b[1;31m3bpp+attr\x1b[m \x1b[91m4bpp\x1b[m \x1b[38:5:196m8bpp\x1b[m \x1b[38;2;255;0;0m24bpp\x1b[m"
Reply with screenshot of the output of this string + add OS/terminal versions
E.g. Ubuntu 24.04.2LTS, Konsole 23.08.5
Btw, is there sth like (www.web3isgoinggreat.com) but about AI fails?
May 12, 2025 at 2:53 PM
Btw, is there sth like (www.web3isgoinggreat.com) but about AI fails?
[PL] W przyszłym tygodniu zaczynam nową serię szkoleniową - 10 projektów w Pythonie krok po kroku (python.sekurak.pl). Coś dla osób bardziej początkujących, w szczególności dla osób, które trafiły na ścianę po hello world / kalkulatorze, albo mają problem jak ↓
April 28, 2025 at 10:10 AM
[PL] W przyszłym tygodniu zaczynam nową serię szkoleniową - 10 projektów w Pythonie krok po kroku (python.sekurak.pl). Coś dla osób bardziej początkujących, w szczególności dla osób, które trafiły na ścianę po hello world / kalkulatorze, albo mają problem jak ↓
Doing a short livestream in ~30 minutes with inspecting a pcap with USB traffic from a gamepad – www.youtube.com/live/xVrxfEk...
🎮 Live CTF: Solving "Gamepad" from Gynvael’s Collection | hackArcana Challenge
YouTube video by GynvaelEN
www.youtube.com
April 2, 2025 at 4:25 PM
Doing a short livestream in ~30 minutes with inspecting a pcap with USB traffic from a gamepad – www.youtube.com/live/xVrxfEk...
Doing a free webinar today at 8PM CEST (i.e. livestream with slides) about "files", as entities on the filesystem, seen through the eyes of a security researcher.
hexarcana.ch/lp/files/ ← sign up here if interested
hexarcana.ch/lp/files/ ← sign up here if interested
March 31, 2025 at 10:03 AM
Doing a free webinar today at 8PM CEST (i.e. livestream with slides) about "files", as entities on the filesystem, seen through the eyes of a security researcher.
hexarcana.ch/lp/files/ ← sign up here if interested
hexarcana.ch/lp/files/ ← sign up here if interested
Paged Out! #6 is out!
pagedout.institute
Totally free, 80 pages, best issue so far!
'nuff said, enjoy!
(please repost to help spread out the news!)
pagedout.institute
Totally free, 80 pages, best issue so far!
'nuff said, enjoy!
(please repost to help spread out the news!)
March 29, 2025 at 12:08 PM
Paged Out! #6 is out!
pagedout.institute
Totally free, 80 pages, best issue so far!
'nuff said, enjoy!
(please repost to help spread out the news!)
pagedout.institute
Totally free, 80 pages, best issue so far!
'nuff said, enjoy!
(please repost to help spread out the news!)
Next Monday I'm doing a 2h webinar on files as seen through the eyes of a cybersecurity researcher. This will cover useful stuff for programmers, more junior pentesters, and other tech enthusiasts who enjoy knowing how stuff works on a computer :)
hexarcana.ch/lp/files/?ut...
hexarcana.ch/lp/files/?ut...
Files through the eyes of a hacker
hexarcana.ch
March 26, 2025 at 8:54 AM
Next Monday I'm doing a 2h webinar on files as seen through the eyes of a cybersecurity researcher. This will cover useful stuff for programmers, more junior pentesters, and other tech enthusiasts who enjoy knowing how stuff works on a computer :)
hexarcana.ch/lp/files/?ut...
hexarcana.ch/lp/files/?ut...