Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
As I understand, a digital signature is obtained by encrypting (the message digest) with your own private key and then the recipient’s public key.
In Java, I can’t figure out how to use a public key to perform the second stage of signing.
Signature sig = Signature.getInstance("MD5WithRSA");
sig.initSign(privateKey);
sig.update(data);
byte[] signatureBytes = sig.sign();
I checked the API, the only methods that use a public key are for verifying…
There’s no recipient involved in a message signature. You can encrypt the signature to the recipient’s public key if you want to prevent anyone else from verifying it, but that’s not generally considered part of signing the message.