For a hash tree that covers 128 data blocks, how many hash checks do you need to perform to localize the error? Assume that error occurred on only one block.
Hash Tree (Merkle Tree) error localization question for 128 data blocks
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The answer is 15. 128 data block produce a tree of depth 8. To find the localize the error (2 multiply depth-1)=(2 multiply 8-1)=15