Key backup is an important part of the cryptographic keylifecycle. (a) Why is it important to back up cryptographic keys? (b) In what ways might backup of cryptographic keys differ from backup of 8. more general data on a computer system? (c) As system administrator of a small organisation deploying symmetric cryptography for protection of all traffic on the local intranet, suggest what techniques and procedures you will use for the backup (and subsequent management of backed-up) cryptographic keys