Cryptography Tutorials - Herong's Tutorial Examples - v5.42, by Herong Yang
DES Key Schedule Algorithm Illustration Program Output
This section provides the execution output of the tutorial Java program, DESSubkeysTest.java, to illustrate how DES key schedule algorithm works.
If you run the DES key schedule algorithm illustration program described in the previous section with JDK, you will get:
herong> javac DESSubkeysTest.java herong> java DESSubkeysTest Input key: 00010011 00110100 01010111 01111001 10011011 10111100 11011111 111... After permuted choice 1 - Active key: 11110000 11001100 10101010 11110101 01010110 01100111 10001111 Subkey #1 after shifting: 11100001 10011001 01010101 11111010 10101100 11001111 00011110 Subkey #1 after permuted choice 2: 00011011 00000010 11101111 11111100 01110000 01110010 Subkey #2 after shifting: 11000011 00110010 10101011 11110101 01011001 10011110 00111101 Subkey #2 after permuted choice 2: 01111001 10101110 11011001 11011011 11001001 11100101 Subkey #3 after shifting: 00001100 11001010 10101111 11110101 01100110 01111000 11110101 Subkey #3 after permuted choice 2: 01010101 11111100 10001010 01000010 11001111 10011001 Subkey #4 after shifting: 00110011 00101010 10111111 11000101 10011001 11100011 11010101 Subkey #4 after permuted choice 2: 01110010 10101101 11010110 11011011 00110101 00011101 Subkey #5 after shifting: 11001100 10101010 11111111 00000110 01100111 10001111 01010101 Subkey #5 after permuted choice 2: 01111100 11101100 00000111 11101011 01010011 10101000 Subkey #6 after shifting: 00110010 10101011 11111100 00111001 10011110 00111101 01010101 Subkey #6 after permuted choice 2: 01100011 10100101 00111110 01010000 01111011 00101111 Subkey #7 after shifting: 11001010 10101111 11110000 11000110 01111000 11110101 01010110 Subkey #7 after permuted choice 2: 11101100 10000100 10110111 11110110 00011000 10111100 Subkey #8 after shifting: 00101010 10111111 11000011 00111001 11100011 11010101 01011001 Subkey #8 after permuted choice 2: 11110111 10001010 00111010 11000001 00111011 11111011 Subkey #9 after shifting: 01010101 01111111 10000110 01100011 11000111 10101010 10110011 Subkey #9 after permuted choice 2: 11100000 11011011 11101011 11101101 11100111 10000001 Subkey #10 after shifting: 01010101 11111110 00011001 10011111 00011110 10101010 11001100 Subkey #10 after permuted choice 2: 10110001 11110011 01000111 10111010 01000110 01001111 Subkey #11 after shifting: 01010111 11111000 01100110 01011100 01111010 10101011 00110011 Subkey #11 after permuted choice 2: 00100001 01011111 11010011 11011110 11010011 10000110 Subkey #12 after shifting: 01011111 11100001 10011001 01010001 11101010 10101100 11001111 Subkey #12 after permuted choice 2: 01110101 01110001 11110101 10010100 01100111 11101001 Subkey #13 after shifting: 01111111 10000110 01100101 01010111 10101010 10110011 00111100 Subkey #13 after permuted choice 2: 10010111 11000101 11010001 11111010 10111010 01000001 Subkey #14 after shifting: 11111110 00011001 10010101 01011110 10101010 11001100 11110001 Subkey #14 after permuted choice 2: 01011111 01000011 10110111 11110010 11100111 00111010 Subkey #15 after shifting: 11111000 01100110 01010101 01111010 10101011 00110011 11000111 Subkey #15 after permuted choice 2: 10111111 10010001 10001101 00111101 00111111 00001010 Subkey #16 after shifting: 11110000 11001100 10101010 11110101 01010110 01100111 10001111 Subkey #16 after permuted choice 2: 11001011 00111101 10001011 00001110 00010111 11110101 DES subkeys test result: true
Table of Contents
Introduction to AES (Advanced Encryption Standard)
►DES Algorithm - Illustrated with Java Programs
DESSubkeysTest.java - DES Key Schedule Algorithm Illustration
►DES Key Schedule Algorithm Illustration Program Output
DESCipherTest.java - DES Cipher Algorithm Illustration
DES Cipher Algorithm Illustration Program Output
DES Algorithm Java Implementation
DES Algorithm - Java Implementation in JDK JCE
DES Encryption Operation Modes
PHP Implementation of DES - mcrypt
Blowfish - 8-Byte Block Cipher
Secret Key Generation and Management
Cipher - Secret Key Encryption and Decryption
RSA Implementation using java.math.BigInteger Class
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
OpenSSL Introduction and Installation
OpenSSL Generating and Managing RSA Keys
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"