Which technology can be used to prevent a cracker from launching a dictionary or brute-force attack of a hash?

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Which technology can be used to prevent a cracker from launching a dictionary or brute-force attack of a hash?
Which technology could be used to prevent a cracker from launching a dictionary or brute-force attack off a hash?

AES
MD5
HMAC
rainbow tables

Explanation: HMACs use an additional secret key as input to the hash function. This adds another layer of security to the hash in order to defeat man-in-the-middle attacks and provide authentication of the data source.

Which technology can be used to prevent a cracker from launching a dictionary or brute-force attack of a hash?

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