OpenCV(Open source computer vision) is an open source programming library basically developed for machine learning and computer vision. It provides common infrastructure to work on computer vision applications and to fasten the use of machine learning in commercial products.With more than 2.5 thousand optimized algorithms for both computer vision and machine learning are both classic and state-of-the-art algorithms. With so many algorithms, makes it to use the library for multiple purposes including face detection & reorganization, identify objects, classify human actions in videos, track camera movements, join images together to produce a high resolution image of an entire scene and ... Read More

The provider of the key pair object can be obtained using the getProvider() method in the class java.security.KeyPairGenerator. This method requires no parameters and it returns the provider of the key pair object.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("DSA");          Provider p = kpGenerator.getProvider();          System.out.println("The Provider is: " + p.getName());       } catch (NoSuchAlgorithmException e) { ... Read More

A KeyPairGenerator object with the key pairs for a particular algorithm can be obtained using the getInstance() method in the class java.security.KeyPairGenerator. This method requires a single parameter i.e. the algorithm name and it returns the KeyPairGenerator object created.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSA");          String algorithm = kpGenerator.getAlgorithm();          System.out.println("The Algorithm is: " + algorithm);       } catch (NoSuchAlgorithmException ... Read More

A key pair can be generated using the generateKeyPair() method in the class java.security.KeyPairGenerator. This method requires no parameters and it returns the key pair that is generated. Every time the generateKeyPair() method is called, it generates a new key pair.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) throws Exception {       try {          KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSA");          KeyPair keyPair = kpGenerator.generateKeyPair();          System.out.println(keyPair);       } catch (NoSuchAlgorithmException e) ... Read More

A key pair can be generated using the genKeyPair() method in the class java.security.KeyPairGenerator. This method requires no parameters and it returns the key pair that is generated.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) throws Exception {       try {          KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSA");          KeyPair keyPair = kpGenerator.genKeyPair();          System.out.println(keyPair);       } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); ... Read More

The number of random bytes as specified by the user can be obtained using the nextBytes() method in the class java.security.SecureRandom. This method requires a single parameter i.e. a random byte array and it returns the random bytes as specified by the user.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");          String s = "Apple";          byte[] arrB = s.getBytes();         ... Read More

The seed bytes as required can be obtained using the method getSeed() in the class java.security.SecureRandom. This method requires a single parameter i.e. the number of seed bytes that need to be generated and it returns the seed bytes as required.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");          byte[] arrB = sRandom.getSeed(5);          System.out.println("The Seed Bytes in array are: " + Arrays.toString(arrB));   ... Read More

The random object can be reseeded using the setSeed() method in the class java.security.SecureRandom. This method requires a single parameter i.e. the required seed byte array and it returns the reseeded random object.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");          String str = "Apple";          byte[] arrB = str.getBytes();          sRandom.setSeed(arrB);          byte[] arrSeed = sRandom.getSeed(5);   ... Read More

The provider for the SecureRandom object can be obtained using the method getProvider() in the class java.security.SecureRandom. This method requires no parameters and it returns the provider for the SecureRandom object.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");          Provider provider = sRandom.getProvider();          System.out.println("The Provider is: " + provider.getName());       } catch (NoSuchAlgorithmException e) { ... Read More

The name of the algorithm for the SecureRandom object can be obtained using the method getAlgorithm() in the class java.security.SecureRandom. This method requires no parameters and it returns the name of the algorithm for the SecureRandom object.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public static void main(String[] argv) {       try {          SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");          String algorithmName = sRandom.getAlgorithm();          System.out.println("The Algorithm is: " + algorithmName);       } catch (NoSuchAlgorithmException e) { ... Read More