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Cryptography
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knaccc
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99 Answers

Score Activity Newest
22 votes
Accepted

Provably fair card deck used by client and server

21 votes
Accepted

Is there a cryptographic algorithm that can make a "lottery ticket"?

13 votes
Accepted

EC Public key encryption scheme where Alice does not know Bob's public key

10 votes

signatures that are verifiably generated by one of several private keys without revealing which one

8 votes
Accepted

Replacing Curve25519 with Ristretto255

8 votes

Why do web-services tend to use preshared secret keys for client authentication instead of public keys?

5 votes

How many valid X25519 private keys are there?

5 votes
Accepted

Encrypting a symmetric key which requires 2 keys to decrypt?

5 votes
Accepted

RFCs & IANA specs about Ed25519 inaccurate?

5 votes

How can you verify private key ownership using a public key and message signature?

5 votes
Accepted

Curve448 - Can Ed448 key material be reused for X448?

5 votes
Accepted

What is a masked secret key in the conxt of Ed25519?

5 votes

Two untrusting people want to come up with a random number

5 votes

Cryptographically safe lookup of value in a set

4 votes
Accepted

Applications in which you should/shouldn't use a salt with HKDF

4 votes
Accepted

It is possible to prove that two private keys are related?

4 votes
Accepted

How is MitM attack prevented when complete session is hijacked?

4 votes
Accepted

How to attest simultaneous knowledge of $2$ private keys?

4 votes

Cryptographically safe lookup of value in a set

3 votes
Accepted

How does the ECIES-AES encryption work with a key size that is not supported by AES?

3 votes

Can salt for HKDF be hardcoded within a program

3 votes

Request for Ring signature numerical example or simple python code

3 votes
Accepted

Why Can't I Use an Nacl Sign Keypair for Encrypt and Decrypt Operations?

3 votes
Accepted

Is it theoretically possible to delegate public key generation?

3 votes
Accepted

Split prvate key without Private Key Holder knowing the key shards?

3 votes
Accepted

Verifying a prediction of the future

3 votes

Can a service provide a hash/encryption key to others that it itself cannot use?

3 votes

Providing tokens for anonymous survey

3 votes
Accepted

Where does signing/decrypting take place on a YubiKey 5 for PGP private key?

3 votes
Accepted

Details about blind signature on ed25519

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