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Results tagged with public-key
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user 38444
An asymmetric cipher is an encryption scheme using a pair of keys, one to encrypt and a second to decrypt a message. This way the encrypting key need not be kept secret to ensure a private communication. Similarly in public key authentication, the verification key can be public and the signing key private.
6
votes
2
answers
328
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What kind of attack could one perform if you generate private keys using SHA3(master_key || ...
I'm aware HMAC is more appropriate than SHA3(master_key || nonce), but I do not understand what kind of attack could be performed against that strategy. How could an attacker use this fact to figure o …
- 1,365
2
votes
1
answer
517
views
What is the difference between "Linkable" and "Traceable" Ring Signatures?
In particular, both papers on Traceable Ring Signatures and Linkable Ring Signatures propose they are fit for the creation of ballots. The Wikipedia Article on Ring Signatures, though, suggests Linkab …
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4
votes
2
answers
379
views
What primitives are needed to generically implement public-key cryptography?
Public-key cryptographic systems are often implemented on top of an existing problem. For example, RSA is built on top of integers and the difficulty of factoring. ECDSA/ECIES are built on top of elli …
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15
votes
1
answer
589
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How to create a decentralized secret ballot among a small group of people?
A small (< 100) group wants to implement an election. For that, each participant must vote in one of N candidates. After everyone has voted, they must be able to determine a winner; yet, nobody must b …
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1
vote
2
answers
236
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Why don't parameters generated by dhparams conform to `(2^p) mod (p-1)/2 == 1`?
I've used openssl dhparams to generate 512-bit DH parameters for a test. The resulting file is:
-----BEGIN DH PARAMETERS-----
MEYCQQDgkQsR2SuYabxysYaxk2oB2Us+YKNbEBQCdhBzMZ/5fb1s80PBDsch5gRD
A5TLoOG/ …
- 1,365
0
votes
1
answer
1k
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What is the simplest digital signature algorithm known?
The hardest part about this question is explaining what I mean by simple. I'm measuring simplicity as, simply, the amount of lines of code it takes to implement that algorithm in a simple programming …
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