ISC2 SSCP:
Cryptograp
hy test
questions
and
answers
2024/2025
,Cryptography
the use of mathematical algorithms to transform information into a form
where it's not readable by unauthorized individuals, but authorized
individuals have the ability to transform it back into its readable form
Cryptography's basic operation
1. Encryption
2. Decryption
Symmetric Encryption
the same key is used to encode and decode
Assymetric Algorithms
A type of encryption that uses two keys in a matched pair to encrypt and
decrypt data, a public and private key. Examples include, RSA, Diffie
Hellman(DH), Elliptic Curve(can be used with Diffie Hellman)
Symmetric Key Algorithm
n(n-1) / 2
e.g. 10 people would need 45 keys
Public Key
An asymmetric encryption key that does not have to be protected.
private key
An asymmetric encryption key that does have to be protected.
Confidentiality
the assurance that messages and information are available only to those
who are authorized to view them
Data at Rest
Data that is stored.
Data in Transit
Data that is in transit across a network, such as an email sent across the
Internet.
Data in Use
Any data currently being used by a computer. Because the computer
needs to process the data, it is not encrypted while in use.
, Integrity
no unauthorized changes
Authentication
proof of identity claims
Obfuscation
hiding sensitive data,
non repudiation
verification of origin
5 steps of cryptography
1. Confidentiality
2. Integrity
3. Authentication
4. Obfuscation
5. Non Repudiation
Code
A system that substitutes one word or phrase for another; intended to
provide secrecy and or efficiency.
Cipher
A system that uses mathematical algorithms to encrypt and decrypt
messages
Stream Cipher
operate on one char/bit of a message at a time.
Block Cipher
An encryption method that encrypts data in fixed-sized blocks.
Substitution Cipher
A method of encryption and decryption in which each letter in the
alphabet is replaced by another.
Transposition Cipher
A cipher that rearranges the order of characters in a message
Security through Obscurity
Relying upon the secrecy or complexity of an item as its security, instead
of practicing solid security practices.
Key length and Performance are __________ proportional
Cryptograp
hy test
questions
and
answers
2024/2025
,Cryptography
the use of mathematical algorithms to transform information into a form
where it's not readable by unauthorized individuals, but authorized
individuals have the ability to transform it back into its readable form
Cryptography's basic operation
1. Encryption
2. Decryption
Symmetric Encryption
the same key is used to encode and decode
Assymetric Algorithms
A type of encryption that uses two keys in a matched pair to encrypt and
decrypt data, a public and private key. Examples include, RSA, Diffie
Hellman(DH), Elliptic Curve(can be used with Diffie Hellman)
Symmetric Key Algorithm
n(n-1) / 2
e.g. 10 people would need 45 keys
Public Key
An asymmetric encryption key that does not have to be protected.
private key
An asymmetric encryption key that does have to be protected.
Confidentiality
the assurance that messages and information are available only to those
who are authorized to view them
Data at Rest
Data that is stored.
Data in Transit
Data that is in transit across a network, such as an email sent across the
Internet.
Data in Use
Any data currently being used by a computer. Because the computer
needs to process the data, it is not encrypted while in use.
, Integrity
no unauthorized changes
Authentication
proof of identity claims
Obfuscation
hiding sensitive data,
non repudiation
verification of origin
5 steps of cryptography
1. Confidentiality
2. Integrity
3. Authentication
4. Obfuscation
5. Non Repudiation
Code
A system that substitutes one word or phrase for another; intended to
provide secrecy and or efficiency.
Cipher
A system that uses mathematical algorithms to encrypt and decrypt
messages
Stream Cipher
operate on one char/bit of a message at a time.
Block Cipher
An encryption method that encrypts data in fixed-sized blocks.
Substitution Cipher
A method of encryption and decryption in which each letter in the
alphabet is replaced by another.
Transposition Cipher
A cipher that rearranges the order of characters in a message
Security through Obscurity
Relying upon the secrecy or complexity of an item as its security, instead
of practicing solid security practices.
Key length and Performance are __________ proportional
