Created
September 29, 2018 17:48
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[Differentiate ECB/CBC] #oracle #detection #crypto #blockcipher #cbc #ecb
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| def detect_cipher(cipher_box): | |
| chosen_plaintext = 'a' * 16 * 6 | |
| cipher_text = cipher_box(chosen_plaintext) | |
| cipher_blocks = divide_blocks(cipher_text, 16) | |
| if len(cipher_blocks) != len(set(cipher_blocks)): | |
| return 'ECB' | |
| else: | |
| return 'CBC' |
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