Free cryptography software for windows

Picture Cryptography allows one to store files in RAR format (a type of compression) inside of image files for security Picture Cryptography is an encryption tool. With any RAR file (no matter the contents) and any JPG image, one can store the RAR inside of the JPG image.
With Picutre Cryptography, you will be to both encrypt files this way and recover the encryption.
System requirements:
- Ability to make RAR files (with programs such as WinRAR).

CryptoChat 1.0 helps you to talk contacts just like any other instant messenger.

Major Features:

1. Featuring automatic public-key exchange and encryption with the Blowfish algorithm, this program is designed with the intention of providing the highest level of security.
2. It implements public-key cryptography, and uses the Diffie-Hellman key exchange protocol to establish a random session key for communications.
3. CryptoChat uses the IRC (Internet Relay Chat) system to communicate, and can also be used in an 'unencrypted' mode as a standard IRC client.

CryptoSafe 2.0.1 is a must- have tool which provides on-line encryption of files saved in protected directories. Encryption/decryption of a selected file proceeds by simply copying or saving into/out of protected directory, so it is very easy for the user. It is impossible to open a protected directory without the proper smart card. Cipher keys are secure saved on cryptography smart cards. In case the smart card is stolen with computer, the robber can to guess the PIN only several times over, then the smart card is blocked and useless for decryption.

CryptoSafe enables to encrypt only selected directories and files, without necessity to encrypt whole hard disk, so process is very fast. CryptoSafe makes secure back-up of the encrypted files possible. In addition, full version of CryptoSafe provides to utilize smart cards for storage of certificates for digital sign, e-mail encryption, authentication to systems and Single Sign-On (all user names and passwords are secure stored on smart card under one PIN).

Xiao Steganography will hid data in image and audio files Xiao Steganography is an application that will hid data in image and audio files.
Steganography is the art of covered or hidden writing. The purpose of steganography is covert communication to hide a message from a third party. This differs from cryptography, the art of secret writing, which is intended to make a message unreadable by a third party but does not hide the existence of the secret communication.
Although steganography is separate and distinct from cryptography, there are many analogies between the two, and some authors categorize steganography as a form of cryptography since hidden communication is a form of secret writing (...)
The most common steganography method in audio and image files employs some type of least significant bit substitution or overwriting. The least significant bit term comes from the numeric significance of the bits in a byte.
The high-order or most significant bit is the one with the highest arithmetic value (i.e., 27=128), whereas the low-order or least significant bit is the one with the lowest arithmetic value (i.e., 20=1).
As a simple example of least significant bit substitution, imagine "hiding" the character G across the following eight bytes of a carrier file (the least significant bits are blue):
10010101 00001101 11001001 10010110
00001111 11001011 10011111 00010000
A G is represented in the American Standard Code for Information Interchange (ASCII) as the binary string 01000111. These eight bits can be "written" to the least significant bit of each of the eight carrier bytes as follows:
10010100 00001101 11001000 10010110
00001110 11001011 10011111 00010001
In the sample above, only half of the least significant bits were actually changed (shown above in red). This makes some sense when one set of zeros and ones are being substituted with another set of zeros and ones.
Least significant bit substitution can be used to overwrite legitimate RGB color encodings or palette pointers in GIF and BMP files, coefficients in JPEG files, and pulse code modulation levels in audio files.
By overwriting the least significant bit, the numeric value of the byte changes very little and is least likely to be detected by the human eye or ear.

Crypt Edit application is a very powerful multidocument word processor with enhanced cryptography features.
It can easily save texts as HTML, DOC, RTF, ASCII (DOS, WIN, UNIX, MAC), WRI, UNICODE and PRT (Protected Text Format with 3 security levels), encrypt/decrypt binary files with compression, create desktop shortcuts for your documents, insert OLE-objects and pictures (gif, jpeg, bmp, emf, wmf).
The program includes an advanced e-mail client with an address book, a spelling checker, a built-in clipboard viewer, various converters (Lowercase, Uppercase, ROT-13, OEM etc.), a character map, an autoformat tool and much more. Microsoft IntelliMouse is also supported.
Other notable features are several numbering and underline styles, minimization to the system tray, a drag-and-drop interface, lines sorting operations and html-highlighting.

LLCryptoLib will provide methods and properties for object-oriented cryptography software tools for the .NET platform.
The program offers both text and stream encryption classes and hashing functions for text and binary files, plus full shredding capabilities.
It is engineered to be easy to use and standard compliant, fully compatible with ASP.NET Web Applications and Visual C#, Visual Basic .NET, Managed C++ .NET Applications.
LLCryptoLib can be linked to managed (.NET) and unmanaged (COM) projects.
Main features:
Hashing algorithms:
- MD2
- MD4
- MD5
- SHA1
- SHA256
- SHA384
- TIGER
- RIPEMD160
- CRC32
Symmetric Encryption algorithms:
- ROT13
- Playfair
- PseudoDES
- DES
- Triple DES
- Rijndael (AES)
- ARC4 - up to 2048 bits
- Blowfish - up to 448 bits
Text to binary conversions:
- Plain text (UTF8)
- Hexadecimal (with 4 styles)
- Base64
Storage Shredding algorithms
- US Department of Defense
- Guttman
- Simple 1 step
- Complex 3 steps
Library features:
- .NET API Compliant
- Asynchronous feedback on operations through delegates
- Enums based algorithm choice
- MSDN Style documentation on both HTML and WinHelp formats