Hide arbitrary data in texts through automatic text rephrasing with TextHide!

Objectives: Most secure and most inconspicuous method for transmitting and storing information: The best known encryption methods are used and additionally the encrypted information is hidden so that it can't be recognized as such.

The TextHide prototype was official highlight of CeBIT '99
Reason: TextHide hides data most inconspicuously and therefore grants best security for your data.

The secret text "Meeting: 9 o'clock at my home" is to be hidden. A non-secret text – from the provided collection of texts – is "the auto drives fast on a slippery road over the hill". The secret text controls the rephrasing of this text and returns for instance: "Over the slope the car travels quickly on an ice-covered street." The sense of the sentence was preserved. Through the fact that exactly this one out of numerous possibilities for rephrasing was selected, the secret data is stored.

• journalists, press officers
• pupils, students
• authors
• everyone who needs a text in different versions or wants to adapt text for one's own purposes

Background

When using obviously encrypted data an eavesdropper will try to find the kind of encryption method to specifically crack this method. In reality most of the known encryption methods can be cracked by secret services. The procedure to introduce a new cryptographic standard in the USA proves this. Most of the suggestions – even successor methods of DES and RSA – have been found to be crackable.

The solution: Use the best encryption method and hide the data in texts. The attacker will believe to read unencrypted text. Even when encrypted data is suspected, the encryption method used is still unclear to the attacker. Furthermore, the TextHide method is able to decode secret data from any kind of text. The decoded data will only make sense when meaningful data had been hidden in the text before. An attacker is not able to distinguish encrypted data from meaningless data.

1. Usage of the RSA-encryption method with public and secret key. This is one of the most secure systems which is known today and is also be used in the well known PGP.
2. One of the best and most modern encryption methods is employed: Twofish. This is a promising candidate for the future American AES standard (Advanced Encryption Standard), i.e. as DES successor (DES – Data Encryption Standard).
3. Gigantically long keys for rearranging the synonym dictionary. Breaking this step by systematic testing with 100.000 super computers would still take about 10²⁰⁰⁰ times longer than our earth has been existing.
4. The patented method for rephrasing text is supposably the most inconspicuous and most widely applicable method for obscuring information. The fields of application range from e-mails & network data communication over newspaper ads & web pages to ordinary conversations.

• TextHide is going to be available for all usual computers and operating systems (Currently it is available for MS-Windows). The decoding program used for the extraction of secret messages is available freely (see demo download).
• The price is $39 US for the light version and $89 US for the professional version.
• TextHide is supplied on a CD together with an extensive collection of sample texts.
• TextHide is within reach out of any usual word processor.

Information & Questions: products@compris.com

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