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8 Cards in this Set
- Front
- Back
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Symmetric key uses how many keys? |
Just one |
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Symmetric encryption is less intensive on what? |
The cpu |
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Symmetric encryption is good for bulk encryption? |
True |
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Symmetric encryption uses which two algorithm types? |
Block and stream cipher. |
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What is the description for block ciphers? |
They encrypt by transposing pain text to cipher text. -fast -can process large data -not great at processing small data -typically implemented in software |
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What is the description for stream ciphers? |
Use a sequence of bits known as keystream. Commonly used for atm card pins and start cards. -best for small amounts of data -slower than symmetric key block ciphers. -better implemented in hardware |
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Stream ciphers use a variable key up to? |
256 bits |
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One of the first popular symmetric encryption algorithm was? |
DES or data encryption standard. Originally designed by IBM in the early 70's. Is currently 56 bits long. Not recommended for use since key has been broken many times. |
