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Questions tagged [lenstra-lenstra-lovasz]

The Lenstra–Lenstra–Lovász (LLL) lattice basis reduction algorithm efficiently finds a short, nearly orthogonal lattice basis form an arbitrary one

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Howgrave-Graham lattice attack on NTRU

I am lookin for a good example to illustrate this attack on NTRU using low parameters but I failed to do that, The attack consist to use LLL reduction on A basis of NTRU Lattice, let us use the column ...
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1 vote
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What is the minimal angle between two LLL reduced vectors?

What is the minimal angle between two LLL reduced vectors? It seems it should be 60 degree as $|\mu_{i,j}| \leq \frac{1}{2}$. If we make the upper bound of $\mu_{i,j}$ by 1/3, can we get better ...
user15864's user avatar
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Does randomization make a big difference in the output of the BKZ algorithm?

We all know that block Korkine-Zolotarev (BKZ) algorithm is essentially a deterministic lattice reduction algorithm. However, in the actual implementation, the BKZ algorithm contains some ...
constantine's user avatar
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Gram-Schmidt upper triangular basis

I'm trying to understand the Gram-Schmidt Orthogonalization process. Below, there is an explanation that a lattice basis can be described by an upper triangular vector. It is often convenient to ...
Semiramis's user avatar