Optimus Prime has returned to Earth, choose an historical character and overcome this threat.
https://en.wikipedia.org/wiki/Extended_Euclidean_algorithm
https://en.wikipedia.org/wiki/Modular_multiplicative_inverse
TwoForOne
Alice sent two times the same message to Bob.
Common Modulus Attack (RsaCtfTool)
Flippin Bank
The Bank of the World is under attack. Hackers found a way in and locked the admins out. However, the netcat authentication by the intruders is not perfectly secure. Could you help the admins log in? Bit-flipping attack
Archetype
The ports smb, mssql are open. impacket tools are used.
TheNotebook
jwt – java web token exploit