Crypto

Perfect Synchronization: recover the Vigenere key from the ciphertext, decrypt the message, and verify the flag.

RsaCtfTool: abuse the AES misuse, derive the missing key material, and decrypt the flag.

CandyVault: model the crypto leak, recover the missing secret, and decrypt the flag.

Optimus Prime: model the crypto leak, recover the missing secret, and decrypt the flag.

Ancient Encodings: model the crypto leak, recover the missing secret, and decrypt the flag.

Flippin Bank: reconstruct the generator state, derive the AES material, and decrypt the final ciphertext.

Gonna Lift Em All: reconstruct the PRNG state from the leak, replay it, and recover the flag.

Binary Basis: model the crypto leak, recover the missing secret, and decrypt the flag.

Brevi Moduli: turn the RSA leak into a lattice recovery, rebuild the secret values, and decrypt the flag.

Hybrid Unifier: abuse the AES misuse, derive the missing key material, and decrypt the flag.

Inizialization: abuse the AES misuse, derive the missing key material, and decrypt the flag.

Read Before You Sign: model the crypto leak, recover the missing secret, and decrypt the flag.

Sekur Julius: reconstruct the PRNG state from the leak, replay it, and recover the flag.

SPG: reconstruct the generator state, derive the AES material, and decrypt the final ciphertext.

Sugar Free Candies: model the crypto leak, recover the missing secret, and decrypt the flag.

Secure Singning: derive the XOR key stream, invert the transform, and recover the flag.

Flip: abuse the AES misuse, derive the missing key material, and decrypt the flag.