Skip to main content

TECH SBH

Search This Blog

My First Blog

Posted by TECH SBH October 30, 2017

Get link
Facebook
X
Pinterest
Email
Other Apps

This is my first blog

please keep visiting for important information

Get link
Facebook
X
Pinterest
Email
Other Apps

Comments

Post a Comment

AD

Popular Posts

JAVA-Arithmetic operation on Complex Numbers

Q. Create a class called Complex for performing arithmetic operation with complex numbers with the following criteria: a. A two-argument constructor b. Methods for add, subtract, multiply and divide two complex numbers c. A method to display the complex number in the form A+iB Write a JAVA program to implement all the arithmetic operations and display the result for Complex class. import java.util.Scanner; class complex { private double real,img; complex(double r,double i) { real=r; img=i; } void add(complex c1,complex c2) { real=c1.real+c2.real; img=c1.img+c2.img; } void sub(complex c1,complex c2) { real=c1.real-c2.real; img=c1.img-c2.img; } void mul(complex c1,complex c2) { real=(c1.real*c2.real-c1.img*c2.img); img=(c1.real*c2.img+c1.img*c2.real); } void div(complex c1,complex c2) { real=(c1.real*c2.real+c1.img*c2.img)/(c2.real*c2.real-c2.img*c2.img); img=(c1.img*c2.real-c1.real*c2.img)/(c2.real*c2.real-c2.img*c2.img)...

Block Cipher- Cryptography

Block Cipher The basic scheme of a block cipher is depicted as follows − A block cipher takes a block of plaintext bits and generates a block of ciphertext bits, generally of same size. The size of block is fixed in the given scheme. The choice of block size does not directly affect to the strength of encryption scheme. The strength of cipher depends up on the key length. Block Size Though any size of block is acceptable, following aspects are borne in mind while selecting a size of a block. Avoid very small block size − Say a block size is m bits. Then the possible plaintext bits combinations are then 2 m . If the attacker discovers the plain text blocks corresponding to some previously sent ciphertext blocks, then the attacker can launch a type of ‘dictionary attack’ by building up a dictionary of plaintext/ciphertext pairs sent using that encryption key. A larger block size makes attack harder as the dictionary needs to be larger. Do not have very large block...

JAVA-Create an interface called Shape3D-Put this class in a package called shapePack and use it in another classes named Parallelepiped, Cube and Sphere to calculate volume and surface area

Q. Create an interface called Shape3D with the following: a. Symbolic constant – PI b. Prototype of methods calcVolume() and calcSurfaceArea() Put this class in a package called shapePack and use it in another classes named Parallelepiped, Cube and Sphere to calculate volume and surface area for each shape. shape3d.java : package shapepack; public interface shape3d { public final static double PI=3.143; public void calc_volume(); public void calc_surfacearea(); } shapetest.java : import shapepack.shape3d; class parallelepiped implements shape3d { int l,b,h; parallelepiped(int x,int y,int z) { l=x; b=y; h=z; } public void calc_volume() { System.out.println("volume of the parallelepiped: "+(l*b*h)); } public void calc_surfacearea() { System.out.println("surfacearea of the parallelepiped: "+(l*b+b*h+h*l)); } } class shapetest { public static void main(String args[]) { parallelepiped ob=new parallelepiped(5,7,9); ob....

AD3

Powered by Blogger