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Cryptography
HNF 2025 - 23summit46
YCEP 2025 - French Frenzy
Forensics
HNF 2025 - Beaconing
HNF 2025 - Flag Transfer Protocol
HNF 2025 - Theres More Than Meets The Ear
YCEP 2025 - Riding WAVes
YCEP 2025 - Stealth Mode Activated
YCEP 2025 - Sum Checker
YCEP 2025 (Training) - Calming
YCEP 2025 (Training) - Logo
Infra Hacking
HNF 2025 - Academy 1
HNF 2025 - Academy 2
HNF 2025 - Friendly Butler
HNF 2025 - KerbeREP Roasting
Miscellaneous
HNF 2025 - Git Commitment Issues
YCEP 2025 - Can I have the Tab
YCEP 2025 - Extensions
YCEP 2025 - Grab Flag
YCEP 2025 - Sort and Read
OSINT
YCEP 2025 - Breaking Records
YCEP 2025 - Etched in memory
YCEP 2025 - Snips and Sips
YCEP 2025 - Vanished Whispers
Web
HNF 2025 - Disallow Robots
HNF 2025 - Kokomelon
CTF Challenges I've Created
PicoCTF
Cryptography
13
basic-mod1
basic-mod2
caesar
credstuff
Custom encryption
Easy1
Flags
HideToSee
interencdec
john_pollard
la cifra de
Mind your Ps and Qs
Mod 26
morse-code
Mr-Worldwide
New Caesar
rail-fence
ReadMyCert
rotation
spelling-quiz
substitution0
substitution1
substitution2
Tapping
The Numbers
transposition-trial
Vigenere
Forensics
advanced-potion-making
CanYouSee
Disk Disk Sleuth
Disk Disk Sleuth II
eavesdrop
endianness-v2
Enhance!
extensions
File types
FindAndOpen
Glory of the Garden
hideme
information
like1000
Lookey here
MacroHard WeakEdge
Matryoshka doll
Mob psycho
Operation Oni
Operation Orchid
Packets Primer
PcapPoisoning
Redaction gone wrong
Scan Surprise
Secret of the Polyglot
shark on a wire 1
Sleuthkit Apprentice
Sleuthkit Intro
So Meta
St3g0
Trivial Flag Transfer Protocol
Verify
What Lies Within
WhitePages
Wireshark Doo Dooo Do Doo...
WPA-ing Out
General Skills
2Warm
ASCII Numbers
based
Bases
Big Zip
Binary Search
binhexa
Blame Game
Codebook
Collaborative Development
Commitment Issues
convertme.py
endianness
First Find
First Grep
fixme1.py
fixme2.py
Glitchcat
HashingJobApp
Lets Warm Up
Magikarp Ground Mission
Nice netcat...
Obedient Cat
Plumbing
PW Crack 1
PW Crack 2
PW Crack 3
PW Crack 4
PW Crack 5
Python Wrangling
repetitions
runme.py
Serpentine
Static ain't always noise
strings it
Super SSH
Tab, Tab, Attack
Time Machine
useless
Warmed Up
Wave a flag
what's a net cat
PicoCTF Writeups
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Challenge Creation
26
Cryptography
2
HNF 2025 - 23summit46
YCEP 2025 - French Frenzy
Forensics
8
HNF 2025 - Beaconing
HNF 2025 - Flag Transfer Protocol
HNF 2025 - Theres More Than Meets The Ear
YCEP 2025 - Riding WAVes
YCEP 2025 - Stealth Mode Activated
YCEP 2025 - Sum Checker
YCEP 2025 (Training) - Calming
YCEP 2025 (Training) - Logo
Infra Hacking
4
HNF 2025 - Academy 1
HNF 2025 - Academy 2
HNF 2025 - Friendly Butler
HNF 2025 - KerbeREP Roasting
Miscellaneous
5
HNF 2025 - Git Commitment Issues
YCEP 2025 - Can I have the Tab
YCEP 2025 - Extensions
YCEP 2025 - Grab Flag
YCEP 2025 - Sort and Read
OSINT
4
YCEP 2025 - Breaking Records
YCEP 2025 - Etched in memory
YCEP 2025 - Snips and Sips
YCEP 2025 - Vanished Whispers
Web
2
HNF 2025 - Disallow Robots
HNF 2025 - Kokomelon
CTF Challenges I've Created
PicoCTF
107
Cryptography
28
13
basic-mod1
basic-mod2
caesar
credstuff
Custom encryption
Easy1
Flags
HideToSee
interencdec
john_pollard
la cifra de
Mind your Ps and Qs
Mod 26
morse-code
Mr-Worldwide
New Caesar
rail-fence
ReadMyCert
rotation
spelling-quiz
substitution0
substitution1
substitution2
Tapping
The Numbers
transposition-trial
Vigenere
Forensics
36
advanced-potion-making
CanYouSee
Disk Disk Sleuth
Disk Disk Sleuth II
eavesdrop
endianness-v2
Enhance!
extensions
File types
FindAndOpen
Glory of the Garden
hideme
information
like1000
Lookey here
MacroHard WeakEdge
Matryoshka doll
Mob psycho
Operation Oni
Operation Orchid
Packets Primer
PcapPoisoning
Redaction gone wrong
Scan Surprise
Secret of the Polyglot
shark on a wire 1
Sleuthkit Apprentice
Sleuthkit Intro
So Meta
St3g0
Trivial Flag Transfer Protocol
Verify
What Lies Within
WhitePages
Wireshark Doo Dooo Do Doo...
WPA-ing Out
General Skills
42
2Warm
ASCII Numbers
based
Bases
Big Zip
Binary Search
binhexa
Blame Game
Codebook
Collaborative Development
Commitment Issues
convertme.py
endianness
First Find
First Grep
fixme1.py
fixme2.py
Glitchcat
HashingJobApp
Lets Warm Up
Magikarp Ground Mission
Nice netcat...
Obedient Cat
Plumbing
PW Crack 1
PW Crack 2
PW Crack 3
PW Crack 4
PW Crack 5
Python Wrangling
repetitions
runme.py
Serpentine
Static ain't always noise
strings it
Super SSH
Tab, Tab, Attack
Time Machine
useless
Warmed Up
Wave a flag
what's a net cat
PicoCTF Writeups
Explore Writeups