Stealth by Henry Hastur in and of itself is not a steganographic program or method. It is usually found with steganographic software on the Internet and is used to complement the steganographic methods. Stealth is a filter that strips off the PGP header that is on a PGP encrypted file. This leaves only the encrypted data. Why is this important? Applying steganography to an encrypted message is more secure than a "plain text" message. However, many encryption applications add header information to the encrypted message. This header information identifies the method used to encrypt the data. For example, if a cracker has identified hidden data in an image and has successfully extracted the encrypted message, a header for the encryption method would point the cracker in the right direction for additional cryptanalysis. But, if the header is removed, the cracker cannot determine the method for encryption. Some steganography software (White Noise Storm and S-Tools) provide this step in security, but others do not.