Solves

Data for the 50 most recent submitted challenge solves. To read writeups for our challenges, visit Solutions.
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Recent Solves
DateUserChallengeScore
rezu You either know, XOR you don't 30
Pet_air Bytes and Big Integers 10
AZZ912 Successive Powers 60
Oswald Key Backup Service 1 (HKCERT CTF) 0
reki38 Modular Arithmetic 1 20
Oswald Cipher Mode Picker (HKCERT CTF) 0
Oswald Chaos (Zh3r0 CTF V2) 0
bxll Base64 10
AZZ912 The Good, The Pad, The Ugly 100
Oswald 1n_jection (Zh3r0 CTF V2) 0
APTashraf2026 Deriving Symmetric Keys 40
Oswald 1337crypt v2 (DownUnderCTF) 0
APTashraf2026 Computing Shared Secrets 30
srishticode ZKP Introduction 5
Pet_air Base64 10
Mualani Resisting Bruteforce 10
APTashraf2026 Modulus Inutilis 50
xsudo Base64 10
Oswald Sign in Please (HKCERT CTF) 0
srishticode Network Attacks 5
zaidstudent4455 SSH Keys 35
Oswald 2020 (TETCTF) 0
zaidstudent4455 Privacy-Enhanced Mail? 25
xsudo Hex 5
anhsaoleloi Passwords as Keys 50
Oswald 1337crypt (DownUnderCTF) 0
APTashraf2026 Salty 20
Pet_air Hex 5
DingoRad Modular Arithmetic 1 20
Mualani Keyed Permutations 5
Pet_air ASCII 5
Pet_air Great Snakes 3
Pet_air Finding Flags 2
joeliousCaesar Chinese Remainder Theorem 40
rezu Favourite byte 20
srishticode Great Snakes 3
AZZ912 Pad Thai 80
noncanonical Chinese Remainder Theorem 40
3662_2C2026_G8 SSH Keys 35
srishticode Finding Flags 2
3662_2C2026_G8 CERTainly not 30
sharadyadav Deriving Symmetric Keys 40
sharadyadav Computing Shared Secrets 30
sharadyadav Computing Public Values 25
AZZ912 Oh SNAP 120
sharadyadav Generators of Groups 20
rezu XOR Properties 15
sharadyadav Working with Fields 10
Yicarmueer Modular Inverting 25
Mohammedosam Forbidden Fruit 150

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