How do I make this java encryption and decryption show different letter and not use the same words in a word E.g. Message: Character Message encrypt: Hmfwfhyjw Message decryption: Character So the letter a are switched out with f. I would all letters to be unique and not be the same Same with r
How do I make this java encryption and decryption show different letter and not use the same words in a word E.g. Message: Character Message encrypt: Hmfwfhyjw Message decryption: Character So the letter a are switched out with f. I would all letters to be unique and not be the same Same with r
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
How do I make this java encryption and decryption show different letter and not use the same words in a word
E.g.
Message: Character
Message encrypt: Hmfwfhyjw
Message decryption: Character
So the letter a are switched out with f. I would all letters to be unique and not be the same
Same with r
![2 import java.util.;
3 public class Main
5
public static boolean isALetter(char letter){
if( (letter = 'a' && letter <= 'z') || (letter = 'A' && letter <= 'Z'))
return true;
return false;
public static int putkeyInRange (int encryptKey){
11
int num;
12▼
13
14
if(encryptKey>=-32767 && encryptKey<=32767){
num=(encryptKey26)+1;
return num;
15
16
System.out.prrìntln("Invlaid input key :");
return -1;
17
18
19
20
public static char encode (char letter, int encryptKey){
return (char)((int)letter+encryptKey);
21
22
public static char decode (char letter, int encryptKey) {
return (char) ((int)letter-encryptKey);
23
24
25
26 public static void main(String [] args) {
27
I
Scanner sc=new Scanner (System.in);
System.out.print("Enter a message: ");
String m-sc.nextline ();
System.out.print("Enter a Key: ");
int key=sc.nextInt();
String encryptMessage="";
String decryptmessage="";
int encryptkey=putKeyInRange (key);
1/encryption process
for(int i=0;ia.length();i++){
if(isALetter(m.charAt(i)))I
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29
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31
32
33
34
35
36 v
37▼
38
encryptMessage+=encode (m.charAt (i), encryptKey);
39
40v
elsef
41
encryptMessage+=m.charAt (i);
42
43
44
//Decrypt process
for(int i=0;i<encryptMessage.length();i++){
if(isALetter(encryptMessage.charAt (i))){
decryptmessage+-decode (encryptMessage.charAt(i),encryptkey);
45 v
46
47
48
else
decryptmessage+=encryptMessage.charAt(i);
49 v
50
51
52
System.out.printin("Encrypt Message: "+encryptMessage);
System.out.println("Decrypt Message: "+decryptmessage);
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54
55
56
57
58 3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F95822252-f634-44df-884c-d6862b395f0e%2Fe2919cf6-7c57-48f7-8dcb-4d9fa83133c6%2Fwczgwrvh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2 import java.util.;
3 public class Main
5
public static boolean isALetter(char letter){
if( (letter = 'a' && letter <= 'z') || (letter = 'A' && letter <= 'Z'))
return true;
return false;
public static int putkeyInRange (int encryptKey){
11
int num;
12▼
13
14
if(encryptKey>=-32767 && encryptKey<=32767){
num=(encryptKey26)+1;
return num;
15
16
System.out.prrìntln("Invlaid input key :");
return -1;
17
18
19
20
public static char encode (char letter, int encryptKey){
return (char)((int)letter+encryptKey);
21
22
public static char decode (char letter, int encryptKey) {
return (char) ((int)letter-encryptKey);
23
24
25
26 public static void main(String [] args) {
27
I
Scanner sc=new Scanner (System.in);
System.out.print("Enter a message: ");
String m-sc.nextline ();
System.out.print("Enter a Key: ");
int key=sc.nextInt();
String encryptMessage="";
String decryptmessage="";
int encryptkey=putKeyInRange (key);
1/encryption process
for(int i=0;ia.length();i++){
if(isALetter(m.charAt(i)))I
28
29
30
31
32
33
34
35
36 v
37▼
38
encryptMessage+=encode (m.charAt (i), encryptKey);
39
40v
elsef
41
encryptMessage+=m.charAt (i);
42
43
44
//Decrypt process
for(int i=0;i<encryptMessage.length();i++){
if(isALetter(encryptMessage.charAt (i))){
decryptmessage+-decode (encryptMessage.charAt(i),encryptkey);
45 v
46
47
48
else
decryptmessage+=encryptMessage.charAt(i);
49 v
50
51
52
System.out.printin("Encrypt Message: "+encryptMessage);
System.out.println("Decrypt Message: "+decryptmessage);
53
54
55
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57
58 3
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