G12: Security

P____ text:

data before encryption.

C_____ text:

the result of applying an encryption algorithmto

data.

E_________:

the making of cipher text from plain text.

Encryption can be used when:

• When transmitting data over a network.

• As a routine procedure when storing data within acomputing system.

• Both

______ key:

encryption key which is not secret.

_______ key:

encryption key which is a secret.

Put these 4 private message steps in the correct order

• 2, 3, 4, 1

• 3, 4, 1, 2

• 4, 3, 2, 1

• 1, 2, 3, 4

What is symmetric key encryption?

• Encryption with two different keys

• Encryption with a secret key shared between sender and receiver

• Encryption with a public key

• Encryption with a password

What is asymmetric encryption?

• Encryption with two different keys

• Encryption with a secret key shared between sender and receiver

• Encryption with a public key

• Encryption with a password

Choose the correct order below for the process of encryption and decryption.

* The product of the encryption is ciphertext, which istransmitted to the recipient.

* The process starts with the original data, plaintext, and whatever form it takes.

* This is encrypted by an encryption algorithm which makes use of a key.

* When the transmission is received it is decrypted using a decryption algorithm and a key to produce theoriginal plaintext.

• 1, 2, 3, 4

• 3, 2, 4, 1

• 2, 3, 1, 4

• 2, 3, 4, 1