Archive for the ‘Cryptography’ Category
Introduction to OpenPGP – Encrypt, decrypt, sign and verify files for free!
January 23rd, 2010 | Author: Haider al-Khateeb
I have also posted this to HackThisSite.org articles
Introduction
Are you looking for a safe way to encrypt your files and messages? What if there is a method that can do all that and more and yet it is FREE to use? If you are interested, keep reading to know about encrypting and exchanging files safely with GPG and PGP.
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MD5 checksums to verify files integrity
January 16th, 2010 | Author: Haider al-Khateeb
MD5 (Message-Digest algorithm 5) can be used effectively to verify files integrity and authenticity by computing and checking MD5 hashes.
In Windows: MD5summer can be used to perform the task.
While in Linux: The famous md5sum utility is usually used.
Introduction to Modern Steganography
January 11th, 2010 | Author: Haider al-Khateeb
This article introduces steganography and explains some of its techniques and methods supported by examples. My objective was to make this post as short as possible while covering all important information. Your comments are welcome for any possible enhancements or for future articles about steganography by me or other people.
I have also posted this to HackThisSite.org articles.
Steganography
Steganography is all the techniques used to exchange secret messages without drawing attention. It is the science of hiding information. Read the rest of this entry »
The pigpen cipher aka Masonic cipher
January 11th, 2009 | Author: Haider al-Khateeb
Have you seen a code similar to this before?
An interesting example from real life is the stone of James Leeson, who died in 1792. For a long time, the box-and-dot code at the top of the stone (Figure 1) remained a mystery for the public, but the secret was revealed as Meyer Berger explained in his NY Times column in the 1950s, it was finally decrypted. It says: “Remember death”. It was a Masonic cipher.
Figure 1: Stone of James Leeson 1
