Simple File Encrypter

• About
• Features
• Requirements
• Downloads
• Technical

About

The Simple File Encrypter was developed to provide a cross-platform utility for encrypting and decrypting files.

This software was developed to solve the simple problem of encrypting a file on one platform, and decrypting it on another. It has been tested on Windows, OS X, Linux, and Solaris.

     

If you want more information or have questions, please contact me at cryptofreek{at}gmail{dot}com.

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Features

• AES (Advanced Encryption Standard) encryption: Supported key sizes are 128, 192, and 256; in order to use keys larger than 128 bits, you will need the Java Cryptographic Extension Unlimited Strength Jurisdiction Policy Files. You can download the policy files for Java 6 here. It is the responsibility of the use to determine the legality of using the umlimited strength cryptography extensions.
• RSA (Rivest/Shamir/Adleman Encryption Algorithm): PKI encryption using PKCS12 or Java keystores.

Features Under Development

• Directory Encryption
• Command-line Batch Operations
• Android Port

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Requirements

• Java 1.6 (or greater); Oracle's JRE or the OpenJDK should do just fine.
• Any computer capable of running Java 6 (or greater) in a graphical environment.

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Downloads

Current Stable Version

no stable releases yet...

Current Beta

Version 0.5b is the current beta. You can download it here.

While I'm pretty sure that the PKI functionality is working ok in 0.5b, use with care... It might blow up :)

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Technical

Encrypted File Format

The encrypted files generated by this software are packaged as standard Zip files. These files have the following structure:

• "iv_key": The initialization vector used in the key encryption process. The IV need not be kept secret, only unique for each encryption operation.
• "iv_data": The initialization vector used in the data encryption process. The IV need not be kept secret, only unique for each encryption operation.
• "salt": The salt used to generate the password based encryption (PBE) key. The salt need not be kept secret, only unique for each encryption operation.
• "wk": The key used to encrypt the data. This key is either encrypted with the password supplied by the user or the recipient's public key.
• "data": The encrypted data.

AES Encryption Information

All AES encryption operations use CBC with PKCS5 padding (AES/CBC/PKCS5Padding). Key sizes of 128, 192, and 256 may be used. However, in order to use keys larger than 128 you must download the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files from Oracle.

PKI Encryption Information

PKI encryption using your own PKI infrastructure to wrap AES keys used for encryption.

Encryption Details