Give examples of what kind of attacks a network can be subjected to

In Public Key Cryptography: Which key is used for decryption, and for encryption?

How does Public Key Cryptography achieve Confidentiality?

Why is it hard to figure out the private key if you have the public key in RSA?

What is SSL?

Block Cipher

What determines the strength of a Block Cipher?

Why should you avoid small block sizes in the Block Cipher?