Exam 3: Cryptography

In a(n) ____________________ attack, the attacker eavesdrops on the victim's session and uses statistical analysis of patterns and inter-keystroke timings to discern sensitive session information.

In modulo 26, what happens if a number is larger than 26?

Digital ____ authenticate the cryptographic key that is embedded in the certificate.

Which cipher is made from a table of 26 distinct cipher alphabets?

Public-key encryption is based on a ____.

Which symmetric encryption cryptosystems was developed to replace both DES and 3DES?

Digital signatures are encrypted messages that can be mathematically proven authentic.

Describe the exclusive OR operation (XOR) function and explain where XOR encryption is used.

The XOR encryption method should be used by itself when an organization is transmitting or storing sensitive data.

Match each item with a statement below. a.Algorithm f.Encipher b.Cryptosystem g.Steganography c.Cryptogram h.Substitution d.Code i.Transposition e.Decipher -The programmatic steps used to convert an unencrypted message into an encrypted sequence of bits that represents the message

Match each item with a statement below. a.Algorithm f.Encipher b.Cryptosystem g.Steganography c.Cryptogram h.Substitution d.Code i.Transposition e.Decipher -The process of replacing plaintext values with other values to form ciphertext

Match each item with a statement below. a.Algorithm f.Encipher b.Cryptosystem g.Steganography c.Cryptogram h.Substitution d.Code i.Transposition e.Decipher -An encryption method or process encompassing the algorithm, key(s) and/or cryptovariable(s), and procedures used to perform encryption and decryption

Why is asymmetric encryption commonly referred to as public-key encryption?

What is a mathematical trapdoor and how is it used with encryption?

Which cipher simply rearranges the values within a block to create the ciphertext?

____ builds on the encoding format of the MIME protocol and uses digital signatures based on public-key cryptosystems to secure e-mail.

Match each item with a statement below. a.Algorithm f.Encipher b.Cryptosystem g.Steganography c.Cryptogram h.Substitution d.Code i.Transposition e.Decipher -To encrypt, encode, or convert plaintext into the equivalent ciphertext

Steganography is technically a form of cryptography.

Describe Public Key Infrastructure (PKI).

Explain how to perform the Vernam cipher encryption operation.