Questions tagged [key-distribution]

The tag has no usage guidance.

10 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3
votes
0answers
78 views

Reduction from integer factoring to computational Diffie Hellman

The computational Diffie Hellman (CDH) problem for ${\mathbb{Z}}^*_p$ is given a prime $p$, a generator $g$ of ${\mathbb{Z}}^*_p$, and a pair $(g^i, g^j)$ to compute $g^{ij}$. The value $g$ is called ...
2
votes
0answers
24 views

Difference between group key agreement, group key sharing, group key distribution and group key establishement

I am currently doing a survey on group key, and throughout my readings, I stumbled on these different terms: Group Key agreement, Group key Sharing, Group key distribution, and Group key establishment....
1
vote
0answers
62 views

How to go about distributed private/public key pair generation?

I'm trying to implement a protocol in which two parties generate a private/public keypair, where both know the public key, but each party has only one part of the private key and cannot derive the ...
1
vote
0answers
48 views

Confirmation signature - Improved Feldman VSS

I am working through the implementation of A Distributed Private-Key Generator for Identity-Based Cryptography. In the paper (Figure 1, page 8) the validation of a share by a node says that once ...
1
vote
0answers
147 views

ABE Cryptography - Send user private key

I am studying Attribute Based Encryption. Now my study concerns CP-ABE scheme. The authority make users private keys using attributes and a Master Secret Key (of Authority). How can the authority send ...
1
vote
0answers
164 views

How to distribute symmetric key between $n$ entities?

If there are $n$ servers for broadcasting a symmetric key in such a manner that following holds: No server alone can find the key $K$ alone. Any two servers can pass $k_i$ and $k_j$ such that $K=f(...
0
votes
0answers
27 views

Compute shared public keys

I want to compute, in a distributed way, the following shared public keys on an elliptic curve: $(xG, x^2G,...,x^nG)$, being $x$ a secret scalar that no single party knows, $G$ the public ...
0
votes
0answers
54 views

Decentralized / Distributed Private Key Generation between Untrusted Parties?

I found an interesting concept in this paper, page 13, (Link to the paper) called "Decentralized private key generation", as follows: "Decentralized private key generation – Multiple Enigma nodes ...
0
votes
0answers
42 views

Security or not in Key distribution

For example, There are 3 clients. I want to deliver specific value $x$ to all clients. $x\leftarrow {0,1,2,...,q-1}$ where q is a large prime number. By using function $f(x)=x*y_{i}*z_{i}$ where i=...
0
votes
0answers
445 views

How does Blom's scheme work?

How does Blom's scheme work? Is the polynomial expression of it a normal one? A few additional questions: How big does the prime modulus need to be? Can it be bigger than the size of the derived key?...