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Dec 31 |
awarded | Scholar |
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Dec 31 |
accepted | C: replace AES FIPS-197 SubBytes table by constant-time code |
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Dec 31 |
comment |
C: replace AES FIPS-197 SubBytes table by constant-time code Fantastic! I confirm it works! A detail: the 8th & 1 can be trimmed (esp. if x is unsigned char; CHAR_BIT is 8 in codegolf). |
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Dec 26 |
comment |
Tips for golfing in C @ugoren: x==3&&f() can be further golfed to x^3||f() |
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Dec 25 |
comment |
C: replace AES FIPS-197 SubBytes table by constant-time code There are several violations: w >> b where b depends on input; also x/8, x%8, and *= (1-badi). The first one is especially likely to degenerate into a timing dependency on low-end CPUs. However, the idea of using wide variables certainly has potential. |
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Dec 25 |
awarded | Self-Learner |
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Dec 24 |
awarded | Teacher |
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Dec 24 |
answered | C: replace AES FIPS-197 SubBytes table by constant-time code |
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Dec 23 |
comment |
C: replace AES FIPS-197 SubBytes table by constant-time code @PaŭloEbermann: My intention should be clear now. |
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Dec 23 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Clarify by intention regarding choice of winning entry |
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Dec 23 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Languages other than C are not proscribed; ranking of size |
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Dec 23 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Languages other than C are not proscribed |
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Dec 23 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Type casts and promotions are free, clarification on * |
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Dec 22 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Typo in title |
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Dec 22 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Minor clarifications |
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Dec 22 |
revised |
C: replace AES FIPS-197 SubBytes table by constant-time code Include +1 and -1 in the favored operators |
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Dec 22 |
comment |
C: replace AES FIPS-197 SubBytes table by constant-time code Nice. The function rj_sbox in aes.c here might give inspiration (although, as is, it does not match the question). |
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Dec 21 |
asked | C: replace AES FIPS-197 SubBytes table by constant-time code |
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May 15 |
revised |
Use NVM to tenaciously resume operation whenever aborted Removed link to the meta |
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May 6 |
revised |
Use NVM to tenaciously resume operation whenever aborted Remove anti-spoiler |
