Module 5: Modern Symmetric Cryptography β Clarification on DES Key Length π
Learn the important correction about DES key length: while often said to be 56 bits, the actual key is 64 bits long with 8 bits used for parity. Essential for understanding modern symmetric encryption!
USF Crypto Center
291 views β’ Feb 5, 2023
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Modern Symmetric Cryptography
Erratum: at min. 15:55, I state that a DES key is 56 bit long. To be more specific, the key is 64 bit long, but 8 of these bits are just used as parity check bits. Only 56 bits of the key actually contribute to the security of the scheme (the effective key length is 56 bits).
Erratum: at min. 15:55, I state that a DES key is 56 bit long. To be more specific, the key is 64 bit long, but 8 of these bits are just used as parity check bits. Only 56 bits of the key actually contribute to the security of the scheme (the effective key length is 56 bits).
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20:49
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Feb 5, 2023
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