The SecureRandom Class:

The SecureRandom class in this provider is a hardware-device-based random number generator and some devices do not support seeding. Therefore, calls to setSeed, getSeed and generateSeed might throw an exception.

Note: that an alias for the algorithm name PKCS11DeviceRNG has been added as IBMSecureRandom for compatibility reasons.

Example of SecureRandom usage

java.security.SecureRandom random = null;
// Could replace PKCS11DeviceRNG with IBMSecureRandom
random = java.security.SecureRandom.getInstance("PKCS11DeviceRNG");
byte[] testData = new byte[1024];
random.nextBytes(testData);

In this example an instance of the SecureRandom class is obtained, a byte array is instantiated, and a random number of size 1024 bytes is generated.

See the Java™ API documentation for the specific methods, default values, and restrictions associated with this class.