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change counter range of ctr mode iv from 128 to 32. #59

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Naruto opened this issue Oct 15, 2017 · 0 comments
Open

change counter range of ctr mode iv from 128 to 32. #59

Naruto opened this issue Oct 15, 2017 · 0 comments

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@Naruto
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Naruto commented Oct 15, 2017

problem

Currently in simon-speck-c version, counter range of ctr mode is 128.

  • NICT requests GCM specification is counter range is 32.
  • ctr128_inc is too slow.

modify

  • speck_ctr_encrypt and speck_ctr_decrypt
    • change counter range of ctr mode iv from 128 to 32.

influence

break compatibility of speck ctr API.
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@Naruto