Certified Encryption Specialist Practice Questions with Verified
Answers Graded A+
What type of encryption uses different keys to
encrypt and decrypt the message?
+Secure Which of the following is not an asymmetric
+Asymmetric system?
+Private key
+Symmetric - ANSWER -Asymmetric +SSL
+DES
Asymmetric cryptography, also known as public +PGP
key cryptography, uses public and private keys to +RSA - ANSWER -DES
encrypt and decrypt data.
The Data Encryption Standard is a symmetric-
key algorithm for the encryption of electronic
data. Although now considered insecure, it was
The most widely used asymmetric encryption highly influential in the advancement of modern
algorithm is what? cryptography.
+Caesar Cipher
+Vigenere
+RSA In order for User A to send User B an encrypted
+DES - ANSWER -RSA message that only User B can read, User A must
encrypt message with which of the following
The RSA encryption algorithm is one of the most keys?
widely used public key encryption algorithms that
have ever been invented. It was created by the +User B's public key
three scientists Ronald Rivest, Adi Shamir, and +User B's private key
Leonard Adleman in 1977, and today it is +User A's public key
increasingly being used in the network area. +User A's private key - ANSWER -USER
B's Public Key
Public key cryptography, or asymmetrical
Original, unencrypted information is referred to cryptography, is any cryptographic system that
as ____. uses pairs of keys: public keys which may be
disseminated widely, and private keys which are
+text known only to the owner
+plaintext
+cleantext
+ciphertext - ANSWER -Plaintext
The greatest weakness with symmetric
Plaintext is a term used in cryptography that algorithms is _____.
refers to a message before encryption or after
decryption. That is, it is a message in a form that +The problem of key exchange
is easily readable by humans. Encryption is the +The problem of generating keys
process of obscuring messages to make them +They are slower than asymmetric
unreadable in the absence special knowledge +They are less secure than asymmetric -
1/8
, Certified Encryption Specialist Practice Questions with Verified
Answers Graded A+
ANSWER -The Problem of Key exchange
+Elliptic Curve
The biggest problem with symmetric key +MD5
encryption is that you need to have a way to get +RSA
the key to the party with whom you are sharing +Diffie-Hellman - ANSWER -Diffie-Hellman
data.
Diffie-Hellman key exchange is a method of
securely exchanging cryptographic keys over a
public channel and was one of the first public-key
Which of the following is generally true about protocols as originally conceptualized by Ralph
block sizes? Merkle and named after Whitfield Diffie and
Martin Hellman. DH is one of the earliest practical
+Block size is irrelevant to security examples of public key exchange implemented
+Block sizes must be more than 256 bits to be within the field of cryptography.
secure
+Larger block sizes increase security
+Smaller block sizes increase security -
ANSWER -Larger Block sizes increase A _________ is a digital representation of
security information that identifies you as a relevant entity
by a trusted third party?
Larger block sizes do increase security, however
at the cost of processing power and encryption +Ownership stamp
time. +Digest
+Digital Signature
+Hash - ANSWER -Digital Signature
A _____ is a function that takes a variable-size A digital signature is a mathematical scheme for
input m and returns a fixed-size string. demonstrating the authenticity of digital
messages or documents
+Hash
+Symmetric cipher
+Feistel
+Asymmetric cipher - ANSWER -Hash What is the standard used by most digital
certificates?
A hash function is any function that can be used
to map data of arbitrary size to data of fixed size. +RFC 2298
The values returned by a hash function are +OCSP
called hash values, hash codes, digests, or +X.509
simply hashes. +CRL - ANSWER -x.509
In cryptography, X.509 is a standard that defines
the format of public key certificates.
Which of the following is a cryptographic protocol
that allows two parties to establish a shared key
over an insecure channel?
2/8
Answers Graded A+
What type of encryption uses different keys to
encrypt and decrypt the message?
+Secure Which of the following is not an asymmetric
+Asymmetric system?
+Private key
+Symmetric - ANSWER -Asymmetric +SSL
+DES
Asymmetric cryptography, also known as public +PGP
key cryptography, uses public and private keys to +RSA - ANSWER -DES
encrypt and decrypt data.
The Data Encryption Standard is a symmetric-
key algorithm for the encryption of electronic
data. Although now considered insecure, it was
The most widely used asymmetric encryption highly influential in the advancement of modern
algorithm is what? cryptography.
+Caesar Cipher
+Vigenere
+RSA In order for User A to send User B an encrypted
+DES - ANSWER -RSA message that only User B can read, User A must
encrypt message with which of the following
The RSA encryption algorithm is one of the most keys?
widely used public key encryption algorithms that
have ever been invented. It was created by the +User B's public key
three scientists Ronald Rivest, Adi Shamir, and +User B's private key
Leonard Adleman in 1977, and today it is +User A's public key
increasingly being used in the network area. +User A's private key - ANSWER -USER
B's Public Key
Public key cryptography, or asymmetrical
Original, unencrypted information is referred to cryptography, is any cryptographic system that
as ____. uses pairs of keys: public keys which may be
disseminated widely, and private keys which are
+text known only to the owner
+plaintext
+cleantext
+ciphertext - ANSWER -Plaintext
The greatest weakness with symmetric
Plaintext is a term used in cryptography that algorithms is _____.
refers to a message before encryption or after
decryption. That is, it is a message in a form that +The problem of key exchange
is easily readable by humans. Encryption is the +The problem of generating keys
process of obscuring messages to make them +They are slower than asymmetric
unreadable in the absence special knowledge +They are less secure than asymmetric -
1/8
, Certified Encryption Specialist Practice Questions with Verified
Answers Graded A+
ANSWER -The Problem of Key exchange
+Elliptic Curve
The biggest problem with symmetric key +MD5
encryption is that you need to have a way to get +RSA
the key to the party with whom you are sharing +Diffie-Hellman - ANSWER -Diffie-Hellman
data.
Diffie-Hellman key exchange is a method of
securely exchanging cryptographic keys over a
public channel and was one of the first public-key
Which of the following is generally true about protocols as originally conceptualized by Ralph
block sizes? Merkle and named after Whitfield Diffie and
Martin Hellman. DH is one of the earliest practical
+Block size is irrelevant to security examples of public key exchange implemented
+Block sizes must be more than 256 bits to be within the field of cryptography.
secure
+Larger block sizes increase security
+Smaller block sizes increase security -
ANSWER -Larger Block sizes increase A _________ is a digital representation of
security information that identifies you as a relevant entity
by a trusted third party?
Larger block sizes do increase security, however
at the cost of processing power and encryption +Ownership stamp
time. +Digest
+Digital Signature
+Hash - ANSWER -Digital Signature
A _____ is a function that takes a variable-size A digital signature is a mathematical scheme for
input m and returns a fixed-size string. demonstrating the authenticity of digital
messages or documents
+Hash
+Symmetric cipher
+Feistel
+Asymmetric cipher - ANSWER -Hash What is the standard used by most digital
certificates?
A hash function is any function that can be used
to map data of arbitrary size to data of fixed size. +RFC 2298
The values returned by a hash function are +OCSP
called hash values, hash codes, digests, or +X.509
simply hashes. +CRL - ANSWER -x.509
In cryptography, X.509 is a standard that defines
the format of public key certificates.
Which of the following is a cryptographic protocol
that allows two parties to establish a shared key
over an insecure channel?
2/8
