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Elliptic Curve Cryptography

Algorithm School

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Benli
Posts: 10
Joined: Tue May 03, 2016 3:40 am
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Elliptic Curve Cryptography

Post by Benli » Wed Feb 01, 2017 6:52 pm

I have two questions about Elliptic Curve Cryptography(ECC).

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private KeyPair keyPairA;
private KeyPair keyPairB;

keyPairA = KeyPair(KeyPair.ALG_EC_F2M,KeyBuilder.LENGTH_EC_F2M_113);
keyPairB = KeyPair(KeyPair.ALG_EC_FP,KeyBuilder.LENGTH_EC_FP_112);


Could anyone tell me what is the difference between ALG_EC_F2M and ALG_EC_FP ?
And is the second parameter the length of private key or public key?

JCaberham
Posts: 24
Joined: Mon Nov 30, 2015 3:02 am
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Re: Elliptic Curve Cryptography

Post by JCaberham » Thu Feb 02, 2017 5:56 am

It's recommended to check JavaCard API documentfirstly.You will find the basic introduction about these.
public static final byte ALG_EC_F2M: KeyPair object containing an EC key pair for EC operations over fields of characteristic 2 with polynomial basis.

public static final byte ALG_EC_FP: KeyPair object containing an EC key pair for EC operations over large prime fields

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