Explain how encryption secure passwords and write a program using either java or python of a hash function that can be used for passwords and give illustration to show how a hash function in cryptography works.
Explain how encryption secure passwords and write a program using either java or python of a hash function that can be used for passwords and give illustration to show how a hash function in cryptography works.
public class Main
{
public static void main(String[] args)
{
String passwordToHash = "password";
String generatedPassword = null;
try {
// Create MessageDigest instance for MD5
MessageDigest md = MessageDigest.getInstance("MD5");
//Add password bytes to digest
md.update(passwordToHash.getBytes());
//Get the hash's bytes
byte[] bytes = md.digest();
//This bytes[] has bytes in decimal format;
//Convert it to hexadecimal format
StringBuilder sb = new StringBuilder();
for(int i=0; i< bytes.length ;i++)
{
sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
}
//Get complete hashed password in hex format
generatedPassword = sb.toString();
}
catch (NoSuchAlgorithmException e)
{
e.printStackTrace();
}
System.out.println(generatedPassword);
}
}
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