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Improved Information Set Decoding - Decoding Random Linear ...

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Classical ISD variants<br />

Stern (1989)<br />

●<br />

Meet-in-the-middle on Q<br />

p/2 p/2 0 w - p<br />

k/2 k/2 l n-k-l<br />

q 1<br />

, … , q k<br />

Q'<br />

I n-k<br />

= s<br />

⇔<br />

s'<br />

*<br />

:<br />

*<br />

+<br />

s<br />

=<br />

0<br />

I n-k<br />

w - p<br />

IMPROVED INFORMATION SET DECODING ASIACRYPT 2011 | December 2011, Seoul

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