CODEWITHSUNDEEP
javarsapublic-key
Chris
Chris

Reputation: 805

Java RSA how to generate different public key?

I have a problem with generating public key for RSA in java. I use KeyPairGenerator and I get public, private key, p, q and modulus. It is fine. But everytime public key is a 65537. Is there any posibility to generate different public key each time?

Code:

KeyPair keys;
KeyPairGenerator generator;

try {
    generator = KeyPairGenerator.getInstance("RSA");
    generator.initialize(1024);
    keys = generator.genKeyPair();
} catch (NoSuchAlgorithmException ex) {}

Upvotes: 1

Views: 2473

Answers (2)

Robert
Robert

Reputation: 42640

The value 65537 is the commonly used exponent of RSA keys. It is nothing unusual that this value is fixed and has no security implications.

There are a number of known weak exponents known - but this value does not belong to it.

Upvotes: 3

Jong Bor Lee
Jong Bor Lee

Reputation: 3855

The public key can't be simply 65537, since in RSA a public key is a pair (n,e) where n is the modulus and e is the exponent. Typically, the exponent is equal to 65537, and it is the modulus that changes.

So, in order to make sure you are generating different keys every time, check that the modulus is changing.

Upvotes: 1

Related Questions