# All Questions

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### set of integers modulo an integer q in lattice

Some literature about lattices set $\mathbb{Z}_{q}$ in $[-\frac{q}{2}, \frac{q}{2})\cap \mathbb{Z}$ but not $[0,q-1]$ such as "lattice signatures without trapdoors" and "lattice based blind ...
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### Does the following function consider to be a cryptographic hash function [closed]

Would the following be considered a cryptographic hash function $$h(x) = x \bmod 2^{256}$$
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### Exclusion proof cost

I am trying to understand what is the cost of non-membership verification for a universal accumulator? More specifically, how can I compute it? Whether using an accumulator is more efficient than ...
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### Factoring $n$ in RSA knowing $e$ and $d$

I know that if $(n,e)$ is the public key in RSA and we also know $d$ the private key, then there is a probabilistic algorithm to factor $n$. I'm reading the proof from Fact 1 on here. I understand ...
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### Inversion in $GF(2^{10})$ Using Composite Fields

I'm designing a circuit that uses many $GF(2^{10})$ inverters. Normally for this sort of thing I use lookup tables. (Itoh-Tsujii is not efficient for these smaller fields.) This application is for ...
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### How to calculate new AES keys for NFC application?

I want to program a couple of AES-enabled NFC tags (for example these) with some custom data, and secure these tags by using the AES features of said tags . In order to increase security, i want to ...
20 views

### Common modulus attack with not coprime exponents

lets suppose we have the public keys $(n,e_1)$ and $(n,e_2)$, such that $\gcd(e_1,e_2)=d>1$, and the same message encrypted with these two keys. I'm trying to see if common modulus attack on RSA ...
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### CP-ABE secure key management

I want to use CP-ABE (Ciphertext Policy- Attribute-Based Encryption) schemes for multicast communication. How can I share both the public key and secret key among the user? How I do set up an ...
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### How to calculate exponent e given textbook RSA public key and modulus N? [closed]

I'm trying to find e and d. I was given: ...