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diff --git a/raw-wiki-dump/GitRepositories%2Fcore%2Fcipher%2Faes b/raw-wiki-dump/GitRepositories%2Fcore%2Fcipher%2Faes deleted file mode 100644 index b46c33c..0000000 --- a/raw-wiki-dump/GitRepositories%2Fcore%2Fcipher%2Faes +++ /dev/null @@ -1,90 +0,0 @@ -{{{ -#!htmlcomment - -This page is maintained automatically by a script. Don't modify this page by hand, -your changes will just be overwritten the next time the script runs. Talk to your -Friendly Neighborhood Repository Maintainer if you need to change something here. - -}}} - -{{{ -#!html -<h1>aes_speed</h1> - -<p>Speed optimized Verilog implementation of the symmetric block cipher AES -(Advanced Encryption Standard) as specified in the NIST document <a href="http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf">FIPS -197</a>.</p> - -<p>This core is modified version of the Cryptech AES core. Note that the -name of the core modules are identical to that core. The purpose of this -is to allow a drop-in replacement in Cryptech designs.</p> - -<h2>Status</h2> - -<p>Second round of optimizations done. The core has been implemented in -FPGA and tested in real HW.</p> - -<h2>Introduction</h2> - -<p>This implementation supports 128 and 256 bit keys. The -implementation is iterative and process one 128 block at a time.</p> - -<p>The encipher and decipher block processing datapaths are separated and -basically self contained given access to a set of round keys and a -block. This makes it possible to hard wire either encipher or decipher -and allow the build tools to optimize away the other functionality which -will reduce the size to about 50%. For cipher modes such as CTR, GCM -decryption in the AES core will never be used and thus the decipher -block processing can be removed.</p> - -<p>The core has been equipped with 16 S-boxes for encipher and 16 Inverse -S-boxes for decipher. This allows the core to perform the SubBytes and -InverseSubBytes operations in the AES round functions in one cycle.</p> - -<p>The key expansion does not share S-boxes with the encipher datapath, so -the total number of S-boxes is 40.</p> - -<h2>Performance comparison</h2> - -<p>Number of cycles for the old Cryptech AES core:</p> - -<ul> -<li>AES-128 Encipher one block: 57</li> -<li>AES-256 Decipher one block: 77</li> -</ul> - -<p>Number of cycles for the Cryptech AES speed core:</p> - -<ul> -<li>AES-128 Encipher one block: 16</li> -<li>AES-255 Decipher one block: 20</li> -</ul> - -<p>Note that these latency numbers are after key expansion. The given key -must be expanded byt asserting the init control bit and wait for ready -to be asserted. Key expansion takes about 10 to 14 cycles.</p> - -<h2>Implementation comparison</h2> - -<p>Implementation results for Xilinx Artix7-t200.</p> - -<p>Old Cryptech AES core:</p> - -<ul> -<li>2094 slices</li> -<li>2854 regs</li> -<li>114 MHz (8.76ns)</li> -</ul> - -<p>Cryptec AES speed core:</p> - -<ul> -<li>2112 slices</li> -<li>2984 regs</li> -<li>116 MHz. (8.62ns)</li> -</ul> -}}} - -[[RepositoryIndex(format=table,glob=core/cipher/aes)]] - -|| Clone `https://git.cryptech.is/core/cipher/aes.git` || |