The example cipher Phil Zimmermann cited: A simple pseudorandom number stream was added to the plaintext stream to create ciphertext, is easily thwarted. Some asked why. Here is why: Step 1, feed the cipher plaintext of all 0's. Since 0 added to any number is same as the number un-changed, it c...

help me, i known't Application description: Build a small application to manage graphic objects as rectangle, square, circle, diamond. Objects information entered from keyboard, includes: Graphic type: one of the following types: rectangle, square, diamond, circle Coordinate first point: i...

Analogy Time A good question-answer pair is like collaborative puzzle solving. The asker has a big puzzle they are trying to solve, and is stuck on some part of it. A good question will identify the specific part they are stuck on, share what pieces they are aware of, and ask for guidance to ...

What would the use be of preboot authentication when Android doesn't support full disk encryption for all files and folders? none.