The primary downside of this feature is that it makes the process of opening encrypted archives even slower. Veracrypt out of the box uses a reasonable PIM value to improve security, but users can provide a higher value to enhance security. Additionally, since version 1.12, a new feature called "Personal Iterations Multiplier" (PIM) provides a parameter whose value is used to control the number of iterations used by the header key derivation function, thereby making brute-force attacks potentially even more difficult. While these default settings make VeraCrypt slower at opening encrypted partitions, it also makes password-guessing attacks slower. For standard containers and other partitions, VeraCrypt uses 655,331 iterations of RIPEMD160 and 500,000 iterations of SHA-2 and Whirlpool by default (which is customizable by user to be as low as 16,000).
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