1. The encryption technique itself is known—published, standardized, and available to everyone, even a potential intruder. Then where does the security of an encryption technique come from? 2. What is...

1. The encryption technique itself is known—published, standardized, and available to everyone, even a potential intruder. Then where does the security of an encryption technique come from?

2. What is the difference between known plaintext attack and chosen plaintext attack?