Open Source Cryptography Software

Store your most valuable notes in a LockNote. Hide your everyday notes in a safe place. Application and document in one: the mechanism to encrypt and decrypt a note is part of it. Secure, simple, independent. No installation required.

UPDATE 2024: Get a new version here: https://github.com/ivoras/EncryptedNotepad2 "Encrypted Notepad" does only one thing, but aims to do it perfectly - a Notepad-like simple text editor where files are saved (and later loaded) encrypted with industrial strength algorithms. Available both for the desktop (as a Java application) and on Android. Unencrypted data is never stored on-disk. Source is released (on SourceForge) under the BSD license.

Caditor is a portable tabbed text editor featuring encryption, syntax highlighting, autocomplete, line numbering and a functional plugin system.

The Arcanum Editor is a small but powerful tool to encrypt and decrypt messages. The program also comes with it's own format CTXT. This format is based on XML and allows you to save texts with the Advanced Encryption Standard.

MSLK provides the precompiled Win32 binaries of some excellent porject with a GPL or similar open source license. Here will keep updated.

AESTextCrypt is an easy-to-use open source tool for text encryption and decryption. Primarily intended for use with email, use it wherever you need to protect text from prying eyes. The encrypted text can be copy/pasted into any text-handling application (e.g. email) instead of plain text. Convenience buttons are provided for clipboard operations. AESTextCrypt uses AES-256 bit encryption which is the strongest available encryption scheme. It also employs bcrypt, which implements key-stretching and an adaptive key setup phase, the complexity (number of rounds) of which is automatically set to match the processing power of the encrypting computer. This makes it highly resistant to dictionary attack. AESTextCrypt is written in Java, so can be run on all desktop platforms - Windows, Mac and Linux.

TextConverter is a graphical text editor allowing the user to encrypt/decrypt the textual contents displayed on the screen using a 128-bit AES (Advanced Encryption Standard) cipher.

PCSecrets is a PC application that holds secret text data - protected by a master password and strong encryption. Use it as a password manager or just somewhere to hold any text data securely in one place. It can hold a second, hidden set of secrets that is undetectable and plausibly deniable. The program is also a PC counterpart of the Secrets for Android app. It uses the same data structure and provides synchronization that allows easy transfer of secrets between the two. For those who find the personal computer environment more comfortable for data entry and editing (i.e. a real keyboard), PCSecrets provides an alternative way to manage your secrets. Sync is also effectively a form of backup. To enable the sync feature with Secrets for Android, you need to install the PCSecrets Sync app, downloadable from SourceForge or Google Play. PCSecrets import plus PCSecrets Sync provides a route to importing secret data into Secrets for Android that would not otherwise be possible.

Programm zur Analyse von Texten und reellen Zahlen. Texte/Zahlen können (mit versch. Optionen) zerlegt werden in einzelne Wörter, Buchstaben oder Ziffern.

Cygnus Editor is a basic text-editing program created entirly in Java. And it's most commonly used to view or edit text files (.txt). A text file is a file type typically identified by the .txt file name extension. In Cygnus Editor you can encrypt your text document, so nobody can see the content of your document. Also you can decrypt your document and edit it. Cygnus Editor uses AES-256 encryption. AES-256 is the most powerful encryption standard yet. AES-256 uses many applications, websites and networks to secure their data. And now you can secure your document with Cygnus Editor.

Dear Diary is a password-protected text editor with features similar to WordPad that automatically encrypts the text before writing to disk. You can format text with different colors, fonts and font sizes as well as insert images into your documents.

This is free Java desktop application to keep your note in safe from others using the Encrypting Decrypting symmetric key algorithm, it's easy to transfer your note form source to another in confidential manner.

Imagine being able to send an encrypted message as a single file to someone working on any Operating System, without them having to install any software to decrypt it. Just send them an Inkjar. Or you can store your own passwords on a usb key anywhere.

A Secure Diary Program written in Java and using the bouncycastle JCE Cryptograpic library. It uses a combination of BlowFish and TripleDES (XORed) to encrypt Diary entries.

The Leeter is an easy-to-use and convinient program to easily write hardly understandable text. While this is mainly not the intention of normal chatters it may be a nice joke to try out on friends. Provides 5 different options to scramble up your text.

Mailcrypt is an Emacs Lisp package which provides a simple interface to public key cryptography with PGP [and now GnuPG!]. Mailcrypt makes strong cryptography a fully integrated part of your normal mail and news handling environment

MicroSafe is a J2ME 1.0 application to store and access notes in a hierarchical data structure (outline) on mobile devices (CLDC - Connected Limited Device Configuration). Notes can be encrypted to store data like PINs, passwords, etc. securely.

It is a simple password manager for your PC and Smartphone. It works like a text editor and uses a strong cryptography algorithm to generate the end file.

P.I.G.: Privacy In Gedit, a plugin for gedit, encode and decode text to base64.

Application scans a given textual string in 146 pen on paper possible combinations- horizontal, vertical, diagonal, reverse, join top, join bottom, groups(2/3/4..), edges & in quadrant dimensions of your choice

Generate RSA key pairs of arbitrary length; convert text between formats or use keys to transform/crypt text. Supports decimal, hexadecimal, base64 and text input and output. Entirely ANSI C++; no external dependencies.

Un programa para cambiar el orden de las palabras en una frase o las letras de una palabra u otros algoritmos. Su principal objetivo es cambiar las frases para hacerlas mas ilegibles o para aparentar ser más friki en tus conversaciones o por diversi

Line command cleaner/converter files.

TextCodec can encode texts using simple algorithm and then decode them by using statistical language data.

Twinkle is an open source text editor that saves the documents in an encrypted form.