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Challenge Creation
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
Explore Writeups
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tags
Tag Index
Found 65 total tags.
aircrack-ng
1
WPA-ing Out
Sep 04, 2024
apk
1
Mob psycho
Sep 19, 2024
ASCII
2
ASCII Numbers
Sep 07, 2024
Lets Warm Up
Sep 07, 2024
ASREProasting
1
HNF 2025 - KerbeREP Roasting
Aug 22, 2026
AudioForensics
1
HNF 2025 - Theres More Than Meets The Ear
Aug 22, 2026
base64
7
HNF 2025 - 23summit46
Aug 22, 2026
interencdec
Oct 01, 2024
FindAndOpen
Sep 25, 2024
ReadMyCert
Sep 19, 2024
Bases
Sep 05, 2024
repetitions
Sep 04, 2024
information
Sep 03, 2024
beginner
1
HNF 2025 - Disallow Robots
Aug 22, 2026
Binary
5
based
Sep 25, 2024
convertme.py
Sep 06, 2024
binhexa
Sep 06, 2024
2Warm
Sep 06, 2024
WhitePages
Sep 03, 2024
BinarySearch
1
Binary Search
Sep 04, 2024
binwalk
3
YCEP 2025 (Training) - Calming
Aug 22, 2026
hideme
Sep 25, 2024
Matryoshka doll
Aug 22, 2024
CaesarCipher
3
interencdec
Oct 01, 2024
caesar
Aug 27, 2024
New Caesar
Aug 26, 2024
ChallengeCreation
25
HNF 2025 - 23summit46
Aug 22, 2026
YCEP 2025 - French Frenzy
Aug 22, 2026
HNF 2025 - Beaconing
Aug 22, 2026
HNF 2025 - Flag Transfer Protocol
Aug 22, 2026
HNF 2025 - Theres More Than Meets The Ear
Aug 22, 2026
YCEP 2025 (Training) - Calming
Aug 22, 2026
YCEP 2025 (Training) - Logo
Aug 22, 2026
YCEP 2025 - Riding WAVes
Aug 22, 2026
+17 more
Checksum
2
YCEP 2025 - Sum Checker
Aug 22, 2026
Verify
Sep 03, 2024
Cryptography
31
Easy1
Aug 22, 2026
HNF 2025 - 23summit46
Aug 22, 2026
YCEP 2025 - French Frenzy
Aug 22, 2026
interencdec
Oct 01, 2024
rotation
Sep 25, 2024
eavesdrop
Sep 25, 2024
Custom encryption
Sep 20, 2024
ReadMyCert
Sep 19, 2024
+23 more
DirectoryEnumeration
1
HNF 2025 - Kokomelon
Aug 22, 2026
easy
58
HNF 2025 - 23summit46
Aug 22, 2026
HNF 2025 - Flag Transfer Protocol
Aug 22, 2026
HNF 2025 - Theres More Than Meets The Ear
Aug 22, 2026
YCEP 2025 (Training) - Calming
Aug 22, 2026
YCEP 2025 (Training) - Logo
Aug 22, 2026
YCEP 2025 - Sum Checker
Aug 22, 2026
HNF 2025 - KerbeREP Roasting
Aug 22, 2026
HNF 2025 - Git Commitment Issues
Aug 22, 2026
+50 more
Endianness
2
endianness-v2
Sep 19, 2024
endianness
Sep 19, 2024
filetypes
6
YCEP 2025 - Extensions
Aug 22, 2026
Secret of the Polyglot
Sep 19, 2024
extensions
Sep 03, 2024
advanced-potion-making
Sep 03, 2024
Trivial Flag Transfer Protocol
Sep 03, 2024
File types
Aug 20, 2024
FileUploadBypass
1
HNF 2025 - Academy 1
Aug 22, 2026
Forensics
44
HNF 2025 - Beaconing
Aug 22, 2026
HNF 2025 - Flag Transfer Protocol
Aug 22, 2026
HNF 2025 - Theres More Than Meets The Ear
Aug 22, 2026
YCEP 2025 (Training) - Calming
Aug 22, 2026
YCEP 2025 (Training) - Logo
Aug 22, 2026
YCEP 2025 - Riding WAVes
Aug 22, 2026
YCEP 2025 - Stealth Mode Activated
Aug 22, 2026
YCEP 2025 - Sum Checker
Aug 22, 2026
+36 more
GeneralSkills
42
based
Sep 25, 2024
Super SSH
Sep 21, 2024
useless
Sep 20, 2024
endianness
Sep 19, 2024
PW Crack 5
Sep 09, 2024
PW Crack 2
Sep 09, 2024
PW Crack 1
Sep 09, 2024
PW Crack 3
Sep 09, 2024
+34 more
Geography
1
Mr-Worldwide
Aug 27, 2024
Git
5
HNF 2025 - Git Commitment Issues
Aug 22, 2026
Blame Game
Sep 06, 2024
Collaborative Development
Sep 06, 2024
Commitment Issues
Sep 05, 2024
Time Machine
Sep 04, 2024
grep
3
Big Zip
Sep 09, 2024
First Grep
Sep 06, 2024
First Find
Sep 04, 2024
GTFOBins
1
HNF 2025 - Academy 2
Aug 22, 2026
hard
4
YCEP 2025 - Stealth Mode Activated
Aug 22, 2026
HNF 2025 - Academy 1
Aug 22, 2026
HNF 2025 - Academy 2
Aug 22, 2026
YCEP 2025 - Etched in memory
Aug 22, 2026
Hash
1
HashingJobApp
Sep 05, 2024
Hex
5
based
Sep 25, 2024
ASCII Numbers
Sep 07, 2024
Lets Warm Up
Sep 07, 2024
binhexa
Sep 06, 2024
WhitePages
Sep 03, 2024
hexedit
2
extensions
Sep 03, 2024
advanced-potion-making
Sep 03, 2024
Image
2
extensions
Sep 03, 2024
advanced-potion-making
Sep 03, 2024
InfraHacking
4
HNF 2025 - Academy 1
Aug 22, 2026
HNF 2025 - Academy 2
Aug 22, 2026
HNF 2025 - Friendly Butler
Aug 22, 2026
HNF 2025 - KerbeREP Roasting
Aug 22, 2026
Jenkins
1
HNF 2025 - Friendly Butler
Aug 22, 2026
MD5
1
HashingJobApp
Sep 05, 2024
medium
68
Easy1
Aug 22, 2026
YCEP 2025 - French Frenzy
Aug 22, 2026
HNF 2025 - Beaconing
Aug 22, 2026
YCEP 2025 - Riding WAVes
Aug 22, 2026
HNF 2025 - Friendly Butler
Aug 22, 2026
YCEP 2025 - Extensions
Aug 22, 2026
YCEP 2025 - Snips and Sips
Aug 22, 2026
like1000
Oct 01, 2024
+60 more
metadata
3
information
Sep 03, 2024
CanYouSee
Aug 30, 2024
So Meta
Aug 21, 2024
Miscellaneous
5
HNF 2025 - Git Commitment Issues
Aug 22, 2026
YCEP 2025 - Can I have the Tab
Aug 22, 2026
YCEP 2025 - Extensions
Aug 22, 2026
YCEP 2025 - Grab Flag
Aug 22, 2026
YCEP 2025 - Sort and Read
Aug 22, 2026
Mod
2
basic-mod2
Aug 25, 2024
basic-mod1
Aug 25, 2024
MorseCode
2
Tapping
Aug 28, 2024
morse-code
Aug 28, 2024
Netcat
2
what's a net cat
Sep 07, 2024
Nice netcat...
Sep 06, 2024
Octal
1
based
Sep 25, 2024
OneTImePad
1
Easy1
Aug 22, 2026
OpenSSL
1
Operation Orchid
Aug 30, 2024
OSINT
4
YCEP 2025 - Breaking Records
Aug 22, 2026
YCEP 2025 - Etched in memory
Aug 22, 2026
YCEP 2025 - Snips and Sips
Aug 22, 2026
YCEP 2025 - Vanished Whispers
Aug 22, 2026
pcap
8
HNF 2025 - Beaconing
Aug 22, 2026
HNF 2025 - Flag Transfer Protocol
Aug 22, 2026
PcapPoisoning
Sep 25, 2024
eavesdrop
Sep 25, 2024
shark on a wire 1
Sep 03, 2024
Wireshark Doo Dooo Do Doo...
Sep 03, 2024
Trivial Flag Transfer Protocol
Sep 03, 2024
Packets Primer
Aug 19, 2024
PWcrack
5
PW Crack 5
Sep 09, 2024
PW Crack 2
Sep 09, 2024
PW Crack 1
Sep 09, 2024
PW Crack 3
Sep 09, 2024
PW Crack 4
Sep 09, 2024
Python
22
like1000
Oct 01, 2024
Custom encryption
Sep 20, 2024
endianness-v2
Sep 19, 2024
PW Crack 5
Sep 09, 2024
PW Crack 2
Sep 09, 2024
PW Crack 1
Sep 09, 2024
PW Crack 3
Sep 09, 2024
PW Crack 4
Sep 09, 2024
+14 more
QRcode
1
Scan Surprise
Aug 29, 2024
RailFence
1
rail-fence
Aug 25, 2024
ROT13
5
rotation
Sep 25, 2024
Wireshark Doo Dooo Do Doo...
Sep 03, 2024
credstuff
Aug 27, 2024
13
Aug 23, 2024
Mod 26
Aug 23, 2024
RSA
2
john_pollard
Aug 28, 2024
Mind your Ps and Qs
Aug 23, 2024
Sleuthkit
7
YCEP 2025 - Stealth Mode Activated
Aug 22, 2026
Operation Oni
Sep 03, 2024
Operation Orchid
Aug 30, 2024
Sleuthkit Apprentice
Aug 22, 2024
Disk Disk Sleuth II
Aug 22, 2024
Disk Disk Sleuth
Aug 20, 2024
Sleuthkit Intro
Aug 19, 2024
SSH
7
HNF 2025 - Academy 1
Aug 22, 2026
Super SSH
Sep 21, 2024
useless
Sep 20, 2024
Magikarp Ground Mission
Sep 07, 2024
Binary Search
Sep 04, 2024
Operation Oni
Sep 03, 2024
Verify
Sep 03, 2024
Steganography
5
YCEP 2025 - Riding WAVes
Aug 22, 2026
St3g0
Sep 25, 2024
Trivial Flag Transfer Protocol
Sep 03, 2024
HideToSee
Aug 23, 2024
What Lies Within
Aug 20, 2024
Steghide
2
YCEP 2025 - Riding WAVes
Aug 22, 2026
Trivial Flag Transfer Protocol
Sep 03, 2024
strings
5
Static ain't always noise
Sep 06, 2024
strings it
Sep 06, 2024
Wave a flag
Sep 06, 2024
Tab, Tab, Attack
Sep 05, 2024
Enhance!
Sep 03, 2024
Substitution
5
Flags
Aug 27, 2024
spelling-quiz
Aug 26, 2024
substitution2
Aug 24, 2024
substitution1
Aug 24, 2024
substitution0
Aug 24, 2024
tar
1
like1000
Oct 01, 2024
Transposition
2
rail-fence
Aug 25, 2024
transposition-trial
Aug 24, 2024
tree
3
Mob psycho
Sep 19, 2024
First Find
Sep 04, 2024
MacroHard WeakEdge
Sep 03, 2024
Vigenere
3
YCEP 2025 - French Frenzy
Aug 22, 2026
la cifra de
Aug 26, 2024
Vigenere
Aug 23, 2024
WebExploitation
2
HNF 2025 - Disallow Robots
Aug 22, 2026
HNF 2025 - Kokomelon
Aug 22, 2026
Wireshark
4
eavesdrop
Sep 25, 2024
WPA-ing Out
Sep 04, 2024
shark on a wire 1
Sep 03, 2024
Wireshark Doo Dooo Do Doo...
Sep 03, 2024
XOR
1
Custom encryption
Sep 20, 2024
zip
4
Mob psycho
Sep 19, 2024
Big Zip
Sep 09, 2024
First Find
Sep 04, 2024
MacroHard WeakEdge
Sep 03, 2024
zsteg
1
St3g0
Sep 25, 2024