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Answer :
Final answer:
Tampering with data that uses hash pointers is detected when recalculating the data block's hash results in a different hash value than the one stored in the hash pointer, indicating that the data has been altered.
Explanation:
To understand how tampering is detected with hash pointers, one must first understand what a hash pointer is. A hash pointer is a type of data structure that, in addition to having a pointer to the location of the previous block of information, includes a cryptographic hash of that block’s data. This hash serves as a unique fingerprint for the data and is highly sensitive to changes. If even a single bit of the data changes, the resulting hash will be entirely different.
Tampering is detected when the hash values do not match. Here's the process:
Thus, to check for tampering, one simply recalculates the hash of the data blocks and compares them to the hashes stored in the hash pointers. Any discrepancies would reveal that the data has been modified.
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