2017weight 0.00VolgaCTF.org
VolgaCTF 2017 Teaser
5 challenges with 6 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeUncategorised4
The upstream scoreboard did not say, so neither do we.
KeyPass
2 official solutionsAlso written up in: r00tus3r.blogspot.in, r00tus3r.blogspot.com
Activity
1 official solutionAlso written up in: blog.blackfan.ru
Bloody Feedback
1 official solutionAlso written up in: dubell.io
Share Point
1 official solutionAlso written up in: dubell.io
Cryptography1
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
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC