64-bit RSA Key Validated by RsaKeyValidator.java

This section provides a tutorial example on how a 64-bit RSA key is validated by RsaKeyValidator.java with 3 rounds of encryption and decryption tests.

To try my RsaKeyValidator.java program, I am going to use the 64-bit RSA key generated from the previous tutorial using RsaKeyGenerator.java:

C:\herong>java RsaKeyGenerator 64 > rsa_64.key

C:\herong>type rsa_64.key
p: 3372213049
q: 3372213067
m: 11371820901801285168
Modulus: 11371820908545711283
Key size: 64
Public key: 8383132602661586723
Private key: 2377205257342368779

C:\herong>java RsaKeyValidator rsa_64.key
--- Reading public key and private key ---
Modulus: 11371820908545711283
Key size: 64
Public key: 8383132602661586723
Private key: 2377205257342368779

--- RSA encryption test ---
Is test passed: true
Original text: 2314539574532842
Cipher text: 6717539904595114684
Decrypted text: 2314539574532842

--- RSA encryption test ---
Is test passed: true
Original text: 474153
Cipher text: 372517405590993925
Decrypted text: 474153

--- RSA encryption test ---
Is test passed: true
Original text: 490393355042176
Cipher text: 9836060768354999626
Decrypted text: 490393355042176

I think my 64-bit RSA key is good. It passed 3 all tests. What do you think?

Last update: 2013.

Table of Contents

 About This Book

 Cryptography Terminology

 Cryptography Basic Concepts

 Introduction to AES (Advanced Encryption Standard)

 Introduction to DES Algorithm

 DES Algorithm - Illustrated with Java Programs

 DES Algorithm Java Implementation

 DES Algorithm - Java Implementation in JDK JCE

 DES Encryption Operation Modes

 DES in Stream Cipher Modes

 PHP Implementation of DES - mcrypt

 Blowfish - 8-Byte Block Cipher

 Secret Key Generation and Management

 Cipher - Secret Key Encryption and Decryption

 Introduction of RSA Algorithm

RSA Implementation using java.math.BigInteger Class

 java.Math.BigInteger Class

 Generating Prime Number with BigInteger Class

 Performance of Prime Number Generation

 RSA Encryption Implementation using BigInteger Class

 RsaKeyGenerator.java for RSA Key Generation

 RSA Keys Generated by RsaKeyGenerator.java

 RsaKeyValidator.java for RSA Key Validation

64-bit RSA Key Validated by RsaKeyValidator.java

 Converting Byte Sequences to Positive Integers

 Cleartext Block Size for RSA Encryption

 Cleartext Message Padding and Revised Block Size

 Ciphertext Block Size for RSA Encryption

 RsaKeyEncryption.java for RSA Encryption Operation

 RsaKeyDecryption.java for RSA Decryption Operation

 Testing RsaKeyEncryption.java with a 16-bit Key

 Testing RsaKeyEncryption.java with a 64-bit Key

 Testing RsaKeyEncryption.java with a 3072-bit Key

 Introduction of DSA (Digital Signature Algorithm)

 Java Default Implementation of DSA

 Private key and Public Key Pair Generation

 PKCS#8/X.509 Private/Public Encoding Standards

 Cipher - Public Key Encryption and Decryption

 MD5 Mesasge Digest Algorithm

 SHA1 Mesasge Digest Algorithm

 OpenSSL Introduction and Installation

 OpenSSL Generating and Managing RSA Keys

 OpenSSL Managing Certificates

 OpenSSL Generating and Signing CSR

 OpenSSL Validating Certificate Path

 "keytool" and "keystore" from JDK

 "OpenSSL" Signing CSR Generated by "keytool"

 Migrating Keys from "keystore" to "OpenSSL" Key Files

 Certificate X.509 Standard and DER/PEM Formats

 Migrating Keys from "OpenSSL" Key Files to "keystore"

 Using Certificates in IE (Internet Explorer)

 Using Certificates in Firefox

 Using Certificates in Google Chrome

 Outdated Tutorials

 References

 PDF Printing Version