Dang Do chap17 - security

what is the original text before encription?

• cipher text

• decrypted text

• plaine text

• plain text

what is INTEGRITY

• where only the intended recipient should be able to read or decipher the data.

• the need to identify who sent the data and verify that the source is legitimate.

• is that data should reach its destination without any changes.

• is that neither the sender nor the recipient should be able to deny that they were part of the data transmission which just took place.

what is key distribution problem?

• happens in asymmetric encryption

• happens in symmetric encryption

• the sender and the recipient need to use the same key

• the keys can be intercepted in transport

a set of protocols, standards and services that allow users to authenticate each other using digital certificates

• certificate authority

• secure sockets layer

• transport layer security

• public key infrastructure

what is a handshake

• initiated by one device sending a message to another device requesting the exchange of data.

• the process of initiating communication between two devices.

• the process of encrypting on both ends

• function in TLS that allows a previous computer session to be ‘remembered’

Digital signature contains

• encrypted digest

• digital certificate

• decrypting key

• encrypting key

When carrying out asymmetric encryption, which of the following users would keep the private key?

• the sender

• the receiver

• both sender and receiver

• all recipients of the message

what are the disadvantages of quantum cryptography

• requires a dedicated line and specialist hardware

• has a unlimited range

• criminals use them for bad purposes (because they are so secure)

• expensive

what is session caching

• initiating communication between two devices

• allowing a previous computer session to be remembered

• generating a digital certificate requested by website owners or individuals.

• allowing users to authenticate each other each session