Certified Encryption Specialist Practice Questions
And Correct Answers
What form of encryption uses a different key to encrypt and decode the message?
+Secure
+Asymmetric
+Private key
+Symmetric - Answer Asymmetric
Public key or asymmetric cryptography utilizes a public/private key in order to
encrypt/decrypt information.
Which of the following is the most common asymmetric encryption algorithm used
today?
+Caesar Cipher
+Vigenere
+RSA
+DES - Answer RSA
The RSA encryption algorithm is one of the most popular public key encryption
algorithms ever invented. It was created by the three scientists Ronald Rivest, Adi
Shamir, and Leonard Adleman in 1977 and today increasingly used in the network area.
Original, unencrypted information is called ____.
,+text
+plaintext
+cleantext
+ciphertext - Answer Plaintext
Plaintext- In cryptography, refers to a message in its initial form, that is, when the
message has not yet undergone encryption, or when it has already been decrypted.
That is, it is a message in a form that can be easily read by human. Encryption- the
process of obscuring messages to make them unreadable in the absence special
knowledge
Which of the following is not an asymmetric system?
+SSL
+DES
+PGP
+RSA - Answer DES
DES - Data Encryption Standard - is a symmetric-key algorithm for the encryption of
electronic data. Although now considered insecure, it has been very influential in the
development of modern cryptography.
For User A to send User B an encrypted message that only User B can read, User A
must encrypt message with which of the following keys?
+User B's public key
+User B's private key
+User A's public key
+User A's private key - Answer USER B's Public Key
Public key cryptography, or asymmetrical cryptography, is any cryptographic system
that uses pairs of keys: public keys which may be disseminated widely, and private keys
which are known only to the owner
, The greatest weakness with symmetric algorithms is ____.
+The problem of key exchange
+The problem of generating keys
+They are slower than asymmetric
+They are less secure than asymmetric -Answer The Problem of Key exchange
The biggest problem with symmetric key encryption is that you must have a method to
deliver the key to the party that you are sharing data with.
Which of the following is generally true about block sizes?
+Block size is irrelevant to security
+Block sizes must be more than 256 bits to be secure
+Larger block sizes increase security
+Smaller block sizes increase security - Answer Larger Block sizes increase security
Larger block sizes does increase security, but with the expense of processing power
and encryption time.
A _____ is a function that takes a variable-size input m and returns a fixed-size string.
+Hash
+Symmetric cipher
+Feistel
+Asymmetric cipher - Answer Hash
And Correct Answers
What form of encryption uses a different key to encrypt and decode the message?
+Secure
+Asymmetric
+Private key
+Symmetric - Answer Asymmetric
Public key or asymmetric cryptography utilizes a public/private key in order to
encrypt/decrypt information.
Which of the following is the most common asymmetric encryption algorithm used
today?
+Caesar Cipher
+Vigenere
+RSA
+DES - Answer RSA
The RSA encryption algorithm is one of the most popular public key encryption
algorithms ever invented. It was created by the three scientists Ronald Rivest, Adi
Shamir, and Leonard Adleman in 1977 and today increasingly used in the network area.
Original, unencrypted information is called ____.
,+text
+plaintext
+cleantext
+ciphertext - Answer Plaintext
Plaintext- In cryptography, refers to a message in its initial form, that is, when the
message has not yet undergone encryption, or when it has already been decrypted.
That is, it is a message in a form that can be easily read by human. Encryption- the
process of obscuring messages to make them unreadable in the absence special
knowledge
Which of the following is not an asymmetric system?
+SSL
+DES
+PGP
+RSA - Answer DES
DES - Data Encryption Standard - is a symmetric-key algorithm for the encryption of
electronic data. Although now considered insecure, it has been very influential in the
development of modern cryptography.
For User A to send User B an encrypted message that only User B can read, User A
must encrypt message with which of the following keys?
+User B's public key
+User B's private key
+User A's public key
+User A's private key - Answer USER B's Public Key
Public key cryptography, or asymmetrical cryptography, is any cryptographic system
that uses pairs of keys: public keys which may be disseminated widely, and private keys
which are known only to the owner
, The greatest weakness with symmetric algorithms is ____.
+The problem of key exchange
+The problem of generating keys
+They are slower than asymmetric
+They are less secure than asymmetric -Answer The Problem of Key exchange
The biggest problem with symmetric key encryption is that you must have a method to
deliver the key to the party that you are sharing data with.
Which of the following is generally true about block sizes?
+Block size is irrelevant to security
+Block sizes must be more than 256 bits to be secure
+Larger block sizes increase security
+Smaller block sizes increase security - Answer Larger Block sizes increase security
Larger block sizes does increase security, but with the expense of processing power
and encryption time.
A _____ is a function that takes a variable-size input m and returns a fixed-size string.
+Hash
+Symmetric cipher
+Feistel
+Asymmetric cipher - Answer Hash
