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Q. _______ uses the idea of certificate trust levels.

Q. If communication between 2 people is overheard by a third person without extraction of any data, it is called as:

Q. PGP is abbreviated as

Q. Packet filtering firewalls work effectively in _________ networks.

Q. In Asymmetric-Key Cryptography, although RSA can be used to encrypt and decrypt actual messages, it is very slow if the message is

Q. means the protection of data from modification by unknown users.

Q. What is the size of the RSA signature hash after the MD5 and SHA-1 processing?

Q. Release of message contents and Traffic analysis are two types of _________ attacks.

Q. Cryptographic hash function takes an arbitrary block of data and returns _________