Cryptography

In this chapter, we will cover the following recipes:

• Asking for passwords—when asking for a password in a terminal-based software, make sure you don't leak it.
• Hashing passwords—how can passwords be stored without a risk of leaking them?
  
• Verifying a file's integrity—how to check that a file transferred over a network wasn't corrupted.
  
• Verify a message's integrity—how to check that a message you are sending to another software hasn't been altered.