301 reputation
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location Paris, France
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visits member for 2 years, 2 months
seen Sep 12 at 14:00

I'm an engineer with experience in applied cryptography, in particular in Smart Card systems.


Jul
8
accepted Exists a binary primitive pentanomial of degree $n$, for every $n\ge5$?
Jul
7
comment Exists a binary primitive pentanomial of degree $n$, for every $n\ge5$?
Just to make it clear: that was me, about 4 years ago. I asked again because math.SE is perfect for this purpose, and there might have been progress/extra info.
Jul
4
revised Exists a binary primitive pentanomial of degree $n$, for every $n\ge5$?
add a line break
Jul
4
asked Exists a binary primitive pentanomial of degree $n$, for every $n\ge5$?
Jul
2
awarded  Curious
Apr
12
comment Enquiry to network flow
@AlexyVincenzo: No with that constraint that $(2,5),(4,5),(6,5),(6,7)$ are saturated. Yes without that constraint (we can reduce everything in proportion $8/14$).
Apr
12
revised Enquiry to network flow
Final polish.
Apr
12
revised Enquiry to network flow
This flow is maximal
Apr
12
revised Enquiry to network flow
Polish
Apr
12
comment Enquiry to network flow
@MJD: We have $(5,7)\le9$, because that's a given. I used $(5,7)←8$ to mean than $(5,7)$ is assigned the value $8$ in the flow, and that matches $8\le9$.
Apr
12
revised Enquiry to network flow
Polish
Apr
12
answered Enquiry to network flow
Apr
7
comment Find the area of quadrilateral formed by $4$ (not consecutive) vertices of a $12$-gon inscribed in a circle.
+1 for the idea of computing the area as ${d_1d_2\over2}\sin\theta$ and getting the details right!
Apr
5
revised Find the area of quadrilateral formed by $4$ (not consecutive) vertices of a $12$-gon inscribed in a circle.
Final polish
Apr
5
revised Find the area of quadrilateral formed by $4$ (not consecutive) vertices of a $12$-gon inscribed in a circle.
deleted 1 characters in body
Apr
5
revised Find the area of quadrilateral formed by $4$ (not consecutive) vertices of a $12$-gon inscribed in a circle.
Add figure
Apr
5
answered Find the area of quadrilateral formed by $4$ (not consecutive) vertices of a $12$-gon inscribed in a circle.
Apr
4
revised How many commutative block ciphers are there?
Some progress
Apr
4
revised How many commutative block ciphers are there?
Zero is best included in M, so that is has n elements.
Apr
4
revised How many commutative block ciphers are there?
SRA is not injective; zero is best included in M, so that is has n elements.