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Q. The__is a polygraphic substitution cipher based on linear algebra.

Q. S/MIME is abbreviated as __________________

Q. Firewall examines each ____________ that are entering or leaving the internal network.

Q. Which of the following attack can actively modify communications or data?

Q. In _______, the cryptographic algorithms and secrets are sent with the message.

Q. In asymmetric key cryptography, the private key is kept by __________

Q. To demonstrate that someone is lying about an alibi, it is necessary to:

Q. ______ was invented by Phil Zimmerman.

Q. In the ______________ layer of OSI model, packet filtering firewalls are implemented.

Q. Which of the statements are not true to classify VPN systems?