Blowfish Cipher Algorithm

Blowfish Cipher Tutorials - Herong's Tutorial Examples

∟Blowfish Cipher Algorithm

Tutorial notes and example codes on Blowfish cipher algorithm. Topics include Blowfish encryption algorithm; Blowfish Sub-key and S-box generation schema; Blowfish decryption algorithm and proof; list of first 8336 hex digits of PI; C program to calculate hex digits of PI.

Blowfish Cipher Encryption Algorithm

Key Schedule (Sub-Keys and S-Boxes) Algorithm

Efficient Form of the Blowfish Algorithm

Blowfish Cipher Decryption Algorithm

Proof of Blowfish Cipher Algorithm

Blowfish Cipher Test Vectors

First 8336 Fractional Hex Digits of PI

piqpr8.c - Generating Hex Digits of PI

Takeaways:

Blowfish cipher is a 16-round and 64-bit block cipher.
18 Sub-keys and 4 S-boxes are derived from a given secret key and hexadecimal digits from constant PI.
Decryption algorithm is identical to the encryption algorithm except that Sub-keys are applied in reverse order.

Table of Contents

About This Book

►Blowfish Cipher Algorithm

Perl Crypt::Blowfish Module

Perl Crypt::ECB Perl Module

Perl Crypt::CBC Module

Perl Crypt::CFB Perl Module

OpenSSL "enc -bf-ecb" for Blowfish/ECB Encryption

OpenSSL "enc -bf-cbc" for Blowfish/CBC Encryption

OpenSSL "enc -bf-cfb" for Blowfish/CFB Encryption

OpenSSL "enc -bf-ofb" for Blowfish/OFB Encryption

PHP Mcrypt Extension for Blowfish

Blowfish 8-Bit Cipher in PHP

References

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