Encryption unit 3 Flashcards
(12 cards)
What is encryption?
A process of converting data into a coded form (ciphertext) to protect it from unauthorized access.
Why is encryption important?
To keep sensitive data secure so that only the intended recipient can read it.
What is a key in encryption?
A value used to encrypt and decrypt data.
What is the difference between symmetric and asymmetric encryption?
- Symmetric encryption: Same key is used to encrypt and decrypt.
- Asymmetric encryption: Uses a public key to encrypt and a private key to decrypt.
What does the Pigpen cipher do?
Replaces letters with symbols using a grid pattern.
How does the Caesar cipher work?
Shifts each letter of the alphabet a fixed number of places.
What is a Vigenère cipher?
A cipher that uses a keyword and a grid of shifted alphabets to encrypt the message.
What is the Rail Fence cipher?
A transposition cipher that writes letters in a zigzag pattern and reads them line by line.
What is ciphertext?
The scrambled output of encrypted data.
What is plaintext?
The original, readable message before encryption.
What is decryption?
Decryption is the process of converting ciphertext (coded or scrambled data) back into plaintext (the original readable form).
What is Pigpen Cipher?
The Pigpen cipher is a substitution cipher where each letter of the alphabet is replaced by a symbol.
