Hashing

• What is the purpose of a hashing function?

  To transform a string of characters into a fixed length value or key that represents the original input string
• How does a hashing function generate a hash value?

  It uses an algorithm that converts the inputted data into a hash value
• What happens to the hash value if there is a slight change in the original message?

  The hash value will be totally different
• What is the main difference between hashing and encryption?

  Hashing is a one-way process, while encryption can be reversed
• Can you retrieve the original value from a hashed value?

  No, you cannot retrieve the original value from the hashed value
• Why is hashing ideal for storing passwords?

  It prevents passwords from being stored in plain text
• What happens when a user logs into an online system using a hashed password?

  The system applies the hashing function to the entered password and compares it to the stored hash value
• What can a hacker see if they access a password file that uses hashing?


  They can only see the hashed values of the passwords
• What is the implication of hashing passwords in terms of security?

  Even if the hashed password is intercepted, it cannot be reverse-engineered to obtain the original password
• How does hashing improve data structure operations like searching and insertion?

  It allows for immediate access to items without needing to search through memory
• What are the key uses of hashing?

  • Preventing storage of passwords in plain text
  • Verifying user passwords without sending them in plain text
  • Quick searching, insertion, and deletion of data in data structures
• What is the significance of hashing in the context of user account creation?

  It ensures that user passwords are securely stored and not exposed
• How does the use of hashing in data structures differ from traditional searching methods?

  Hashing eliminates the need for sorting and allows for immediate access