Collaborate Disseminate
RFC8292 contains this gem:
The “k” parameter includes an ECDSA public key [FIPS186] in
uncompressed form [X9.62] that is encoded using base64url encoding
[RFC7515].
There is an example of the use of such a key a bit furthe… Continue reading What is the format of an X9.62 key?
I’ve heard that a modified version of Shor’s algorithm can “break” ECC. But what does this mean specifically? What are all the things you can do with this algorithm? Can you:
decrypt messages encrypted with the private key?… Continue reading What can you do with a sufficiently complex quantum computer against Elliptic Curve Cryptography?
This is possibly a dumb question. I’m trying to input SECP256K1 curve parameters to a system that expects any custom curve. The form is asking for “curve type”. It offers three options:
Short Weistrass
Twisted Edwards
Mont… Continue reading What is the curve type of SECP256K1?
I have the following scenario: an application that establishes a full mesh connection with itself on a remote server. We use 0MQ and curve certificates for security and authentication, but at the same time we use the same cer… Continue reading Does using the same curve certificate on both ends cause security issues?
I make software for physics labs, and computers in the labs are exchanging all sorts of information with each other and with researcher’s laptops, usually on a university network. I use ZeroMQ for most communication.
I’m wor… Continue reading Is it safe for both client and server to use the same keypair in CurveZMQ?
Please take a look on a picture with index 1. It is an eliptic curve. It is possible to add points on it using some formulae.
It is not a problem to deduce expression for the y_r, but not for the x_r.
Can somebody exp… Continue reading How to deduce formula for eliptic curve x coordinate calculation?
The specification for a project I’m working on says to use elliptic curve Diffie-Hellman for key exchange, specifically using the secp224r1 curve. In the notes it is stated:
take the last 16 bytes of the shared secret by… Continue reading Distribution of randomness in elliptic curve Diffie-Hellman shared secret
I intend to start using GnuPG again. I haven’t used it for the last 2 years and was surprised that there is now the option for RSA and ECC keys.
After reading a bit about ECC, it seems to me there is quite a bit uncertainty about where it… Continue reading Generate new key – ECC vs RSA
Recently I have been researching asymmetric encryption algorithms for a class, I cannot find any information anywhere on the key lengths used in any of the algorithms I’m looking into (ElGamal & Elliptic Curve Cryptograph… Continue reading Asymmetric Encryption [migrated]
Let’s say I wanted to write an implementation of ECDSA from scratch to better understand it. I can’t find a raw, non-abstract explanation anywhere. I tried tracking down the sources on the wiki article and going through some … Continue reading Is There a Whitepaper or Explanation of ECDSA somewhere?