cryptomedium
ReMeeting the Wheel
hackthebox
Task: Hybrid RSA+AES encryption where AES key is a product of two small ~20-bit numbers encrypted with textbook RSA. Solution: Meet-in-the-middle attack exploiting RSA multiplicative homomorphism to split 2^42 search space into two 2^21 passes.
$ ls tags/ techniques/
aes_ecb_decryptionmeet_in_the_middle_attackrsa_homomorphic_splittingmodular_inverse_lookup
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