Cryptography (E-Commerce)

Dynamic packet filters firewall are fourth generation firewalls that work at

• Application layer

• TCP

• TCP, UDP

A message is encrypted using public key cryptography to send a message from sender to receiver. Which one of the following statements is True?

• Sender encrypts using receiver’s public key

• Sender encrypts using his own public key

• Receiver decrypts using sender’s public key

Dynamic packet filters firewall are fourth generation firewalls that work at

• TCP, UDP

• UDP

• Session Layer

What is the key size of Data Encryption Standard algorithm in cryptography ?

• 56 bit

• 62 bit

• 168 bit

One commonly used public-key cryptography method is  the ______ algorithm.

• RSA

• RSS

• RAA