elliptic-curve

I'm trying to create a keystore using keytool with a keyalg ECC. This should be possible according to Oracle . I quote: Area: Tools Synopsis: The keytool and jarsigner tools now support the ECC algorithm in keypair generation and jar signing. RFE: 6870812 I'm using the 32-bit version 1.7.0_07, and I've tried keytool with -keyalg ECC, ECIES, ECDSA,... but I always get Cannot derive signature algorithm . Am I using the wrong Java version? Am I using the wrong name for ECC? Here is the source for the algorithm selection. The allowed values are DSA , RSA and EC . These values are not documented

I want to feed OpenSSL specific data for use as random seed during the signing of data with an EC key. I'm doing this to compare my application with another reference one (closed source). That utility takes the file with private key, file with data to sign and file with random data as parameters. I've got the generation of EC keys, and signing of data down, but can't compare the two applications since I have no common ground. OpenSSL generates random data used in signing the data (probably from /dev/random) and thus gives me a different signature every run. I've tried RAND_clear() in

I am trying to encrypt some content using ECC algorithm using BouncyCastle in java. But I am getting exception of BouncyCastle library saying cannot cast JCEECPublicKey to IESKey . Which I understood that the public key generated by KeyPairGenerator is JCEECPublicKey which cannot be used in java Cipher.init method. Can someone tell me how can convert it in Public key or X509 spec so that I can use it in encryption. Here is the code which I tried // add instance of provider class Security.addProvider(new BouncyCastleProvider()); // initializing parameter specs secp256r1/prime192v1

I'm trying to learn some crypto coding and have generated a 32-byte private key currently held in a byte array ( byte[] privatekey ). I know the public key is generated using the secp256k1 named elliptic curve parameters, and a formula where publickey = G * privatekey , where G is some point on the elliptic curve (ECPoint?), but I am unable to transfer that named parameter spec and formula into actual coding of a public key. I know that since java 7, there are classes included in the java.security.* and java.security.spec.* packages to do this in short code, but I can't find a good example

I am developing Distributed digital signature that signs a document and send it through network to the Application Server.I am using socket programming in java to do it. I think the public key should be encoded or compressed i.e the x and y values are somehow represented as a single binary data and saved in a public registry or network.But i don't know how to do it in java. // I have class like this public class CryptoSystem{ EllipticCurve ec = new EllipticCurve(new P192()); //------------------- //-------------------- public ECKeyPair generatekeyPair() { return ECKeyPair(ec); } } // i don't

I get stack on my error of point multiplication using standard projective coordinates. I don't know what i missed but the multiplied points do not lie on the curve and some times it outputs something like Arithmetic Exception: integer is not invertible. public class ECPointArthimetic { EllipticCurve ec; private BigInteger x; private BigInteger y; private BigInteger z; private BigInteger zinv; private BigInteger one = BigInteger.ONE; private BigInteger zero = BigInteger.ZERO; private boolean infinity; public ECPointArthimetic(EllipticCurve ec, BigInteger x, BigInteger y, BigInteger z) { this.ec