Why do we need DDE ?

DDE is the first public key encryption scheme that is entirely
based on continuous state nonlinear dynamics, and therefore can be
implemented using analog components. In this page we describe potential
uses for DDE.
 

First, we need to make an important distinction between  privacy and security .  
Security:  The secret message can not be decoded using available computation power ( Decoding
by an unauthorized receiver may take years (thousands of years).
Privacy:   The secret message can not be decoded using simple means, or within short time. The
definition of 'simple means'  and 'short time' depends on the level of privacy.

It is clear by now that DDE does provides privacy. Our analysis shows that for high dimensional systems
it can also provide security, however more research has to be done in order to verify and quantify how secure
the method is. Secure communications that provide either privacy or security using simple analog encryption
schemes have tremendous commercial potential :

 

1)   DDE will enable implementation of modulation and encryption in the same circuit.  ( Using RSA public key encryption,
require separate circuits: an analog one for modulation, and a digital one for encryption).

2)  It is unclear for how long digital public key encryption schemes such as RSA will remain secure. DDE provides an alternative
which after further development may  prove to be secure  (by using very high dimensional dynamical systems).

3)  The chaotic switching modulation technique that was used in our simulation modulates
discrete data. We intent to develope modulation technique that will enable the transmission of
continuous data, to enable the encryption of analog data  using purely analog encryption
circuit.
Digital public key encryption schemes already exsists and provide good security, and of
course privacy. ( Public key encryption survey ). However, there are applications that are analog
and either canot be converted to digital, or the convertion to digital will turn to be very complicated
and expensive.

For some communication schemes that are inherently analog the cost of using digital encryption
such as RSA public key is not just the difference between the cost of an RSA chip or a DDE chip,
but also the cost of changing  the entire communication scheme from analog to digital.