Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.
Which of the following uses a key of the same length as the message?
Steganography
One-time pad
Stream cipher
Block cipher
The correct answer is One-time pad. The key must be at least as long as the message to be encrypted, as each key element is used to encode only one character of text.
Study thousands of practice questions that organized by skills and ranked by difficulty.
Create a tailored training plan based on the knowledge you already possess.
Know when you’re ready for the high-stakes exam. Have the confidence that you will pass on your first attempt.