Which of the following provides details about an image, such as a photo's dimensions?

A hash function that satisfies the properties of variable input size, fixed output size, efficiency, preimage resistant and second preimage resistant is referred to as a __________.

A. strong hash function B. collision resistant function C. weak hash function D. preimage resistant function

Many companies require ____ to ensure privacy by preventing bystanders from viewing display contents.

A. screen filters B. LoJack for Laptops C. personal identification numbers D. firewalls