Questions tagged [rlwe]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
4
votes
1answer
151 views

Complete Attack on RLWE Key Exchange with reused keys, without signal leakage

I am studying a research paper "Complete Attack on RLWE Key Exchange with reused keys, without signal leakage" . On page number 21 to 28, there is toy example explaining the scheme. I am unable to ...
1
vote
0answers
48 views

How does the polynomial module impact the security of ring/lattices-based SIS problem?

Consider the following SIS problem: for a function $f_A(s)$=$As$, where $A$ is a fixed, randomly-chosen matrix in $(R_q)^{r \times n}$=$\left(\mathbb{Z}_q[X]/(X^N+1)\right)^{r \times n}$ and $q$ a ...
2
votes
0answers
92 views

Comparison of NTRU-based schemes and LWE-based schemes

What advantages and disadvantages can be distinguished in NTRU-based and LWE-based schemes relative to each other? In what cases which scheme gives advantage? UPD: I'm interesting in two things: 1)...
0
votes
0answers
65 views

Discrete Gaussian Sampling in Authenticated key exchange from ideal lattices

I am implementing the key exchange scheme proposed by zhang et al. on Sage. In the implementation of the scheme, they have used the two distributions $\chi_{\alpha}, \chi_{\beta}$. How to choose $\...
1
vote
1answer
96 views

$\ell_2$-norm vs canonical embedding norm on ring-lwe

Ring-LWE based encryption (I pick up homomorphic encryption here) requires canonical embedding norm rather than $\ell_2$ norm to quantify the polynomial size (e.g. noise). Why is this better than $\...