Block Ciphers: Difference between revisions
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(Created page with "{{DISPLAYTITLE:Block Ciphers (Block Ciphers)}} == Description == A block cipher is a pair of functions $E: \{0, 1\}^k \times \{0, 1\}^n \rightarrow \{0, 1\}^n$ and $D: \{0, 1\}^k \times \{0, 1\}^n \rightarrow \{0, 1\}^n$ that encode and decode a length $n$ string with a length $k$ key. == Parameters == <pre>n: text length (block size) k: key length</pre> == Table of Algorithms == {| class="wikitable sortable" style="text-align:center;" width="100%" ! Name !! Ye...") |
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== Parameters == | == Parameters == | ||
n: text length (block size) | |||
k: key length | |||
k: key length | |||
== Table of Algorithms == | == Table of Algorithms == | ||
Revision as of 13:03, 15 February 2023
Description
A block cipher is a pair of functions $E: \{0, 1\}^k \times \{0, 1\}^n \rightarrow \{0, 1\}^n$ and $D: \{0, 1\}^k \times \{0, 1\}^n \rightarrow \{0, 1\}^n$ that encode and decode a length $n$ string with a length $k$ key.
Parameters
n: text length (block size)
k: key length
Table of Algorithms
| Name | Year | Time | Space | Approximation Factor | Model | Reference |
|---|---|---|---|---|---|---|
| Lucifer / DES | 1976 | $O(n)$ | $O(n)$? | Exact | Deterministic | |
| IDEA | 1991 | $O(n)$ | $O(n)$? | Exact | Deterministic | |
| RC5 | 1994 | $O(n)$ | $O(k+rw)$? | Exact | Deterministic | Time |
| Rijndael / AES | 2001 | $O(n)$ | $O(n)$? | Exact | Deterministic | Time |
| Blowfish | 1993 | $O(n)$ | $O(n)$? | Exact | Deterministic | Time |