2025from public repositories
CTF Advanced Cybersecurity 2025
17 challenges with 17 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised9
The upstream scoreboard did not say, so neither do we.
Alohomora Didn't Work [Easy]
1 official solutionCat in the Bag [Hard]
1 official solutionCompromising Support [Medium]
1 official solutionExpensive Backup [Hard]
1 official solutionKNU Knife [Medium]
1 official solutionNewTriton [Medium]
1 official solutionNotepad [Easy]
1 official solutionSigned to Be Owned [Medium]
1 official solutionUSB Unusual Secret Breach [Easy]
1 official solution
Cryptography5
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Solve it with:Cipher identifier and automatic decoderVigenere cipher solver with automatic key recoveryRSA decryption and attack runnerWiener’s attack on small RSA private exponentsIn-browser hash cracker with rule transformsLearn: Classical ciphers and frequency analysisLearn: RSA and the parameters that break it
Back to the Past [Medium]
1 official solutioneVoting! [Hard]
1 official solutionKey Under the Doormat [Easy]
1 official solutionThe debut cipher [Easy]
1 official solutionThe Encrypted Notes [Easy]
1 official solution
Forensics3
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Solve it with:File type identifier by magic bytesMagic byte and file signature tablePCAP analyzer for CTF network forensicsEXIF metadata viewerLearn: File forensics and carvingLearn: Network forensics
Cost of the Image [Medium]
1 official solutionNoise in the logs [Easy]
1 official solutionStudent Petro [Medium]
1 official solution