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To prevent information leakage, dynamic memory containing sensitive information should be sanitized before it is marked for deallocation. Below, this is done by filling the allocated space with {{'\0'}} characters. Note that {{calloc()}} is also used to zero-out newly allocated memory. Note that because {{sizeof(char)}} is guaranteed to be 1, this solution does not need to check for ana integernumeric overflow as a result of using {{calloc()}} \[[MEM37-C | MEM37-C. Ensure that size arguments to calloc() do not result in an integer overflow]\].