Private and Public Key DNA Steganography C. Richter, A. Leier, W. Banzhaf, and H. Rauhe Cho, Dong-Yeon.

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Presentation transcript:

Private and Public Key DNA Steganography C. Richter, A. Leier, W. Banzhaf, and H. Rauhe Cho, Dong-Yeon

Private Key Encryption Steganography with Digital DNA  Assembly of DNA binary strands  Secret messages  For encryption, the message strand that corresponds to the binary encoded plaintext was mixed with other DNA, so- called dummy strands, in equimolar amounts.  For decryption, unique PCR priming sites were attached to the message strand such that the PCR primers worked as secret key by amplifying the message strand selectively.

 Security  A and B exchange the generated key over a secure communication channel. It is expected that only A and B have the knowledge about the key.  A generates the message following the binary pattern and adds the key in ligation step.  A generates a certain number of dummies and puts the massage strand among them.  A sends the resulting solution to B, using an open communication channel.  B decrypts the message.

Graphical Decryption  The key sequence could not be used as a distinctive feature for the readout process anymore.  Instead the pool of dummy strands used for encryption was used as decryption key.

 Readout of both the dummy pool (Y) and the encrypted pool (X) resulted in two different gel-images.  Using techniques of digital image processing, these gel-images were then subtracted graphically and yielded the original message strand’s binary sequence (A).