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I have buffer of 16 bytes that encrypt with AES 128 cbc with IV =000000......(all IV is 0)

I have the encrypted buffer, and I know 7 bytes from 16 bytes before the encryption , I dont know the key .

I want to find out the key.

Is that help to find out the key? Less option than 2^128?

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marked as duplicate by kelalaka, Squeamish Ossifrage, Maarten Bodewes Mar 12 at 0:24

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