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20 Cards in this Set
- Front
- Back
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_____________ refers to every possible value for a cryptographic key. |
Keyspace |
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_____________ is the function most commonly seen in cryptography, a "bitwise exclusive" or |
XOR |
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When the government keeps a copy of your private key, it is called what? |
Key escrow |
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Processing through an algorithm more than once with different keys is called what? |
Multiple encryption |
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The basis for symmetric cryptography is the principle of a(n): |
Shared secret |
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Making two inputs result in the exact same cryptographic hash is called a(n): |
Collision attack |
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A simple way to hide information, the _______________ moves a letter a set number of places down the alphabet. |
Shift cipher |
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A cipher that works by enciphering the plaintext bit by bit, instead of in blocks. |
Stream cipher |
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What is required for symmetric encryption? |
Key management |
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The process of attempting to break a cryptographic system is: |
Cryptanalysis |
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If a message has a hash, how does the hash protect the message in transit? |
If the message is edited, the hash will no longer match. |
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How is 3DES different from many other types of encryption listed here? |
It uses three keys and multiple encryption and/or decryption sets. |
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What is the best kind of key to have? |
Long and random |
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A good hash function is resistant to what? |
Collisions |
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When a message is sent, no matter what its format, why do we care about its integrity? |
To show that the message has not been edited in transit |
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What is the biggest drawback to symmetric encryption? |
It requires a key to be securely shared |
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How is 3DES an improvement over normal DES? |
It uses three keys and multiple encryption and/or decryption sets |
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What is AES meant to replace? |
DES |
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What kind of encryption cannot be reversed? |
Hash functions |
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What cipher was chosen to be the new AES standard? |
Rijndael |
