Generate Public Private Key Pairs

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To generate key pairs using different algorithms and key sizes:

final KeyPairGenerator dhGenerator = KeyPairGenerator.getInstance("DiffieHellman");
final KeyPairGenerator dsaGenerator = KeyPairGenerator.getInstance("DSA");
final KeyPairGenerator rsaGenerator = KeyPairGenerator.getInstance("RSA");


final KeyPair dhPair = dhGenerator.generateKeyPair();
final KeyPair dsaPair = dsaGenerator.generateKeyPair();
final KeyPair rsaPair = rsaGenerator.generateKeyPair();

Additional algorithms and key sizes may be available on your implementation of the Java platform.

To specify a source of randomness to use when generating the keys:

final KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

generator.initialize(2048, SecureRandom.getInstance("SHA1PRNG", "SUN"));

final KeyPair pair = generator.generateKeyPair();

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