Title: Signal hiding encryption/deciphering method and appts. based on virtual holographic series
Application Number: 200410019056 Application Date: 2004.04.20
Publication Number: 1564503 Publication Date: 2005.01.12
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04K1/00,H04N1/44
Applicant(s) Name: Shenzhen Univ. Address: 518060
Inventor(s) Name: Peng Xiang, Zhang Peng
Attorney & Agent: jie songfan
Abstract:
     The method uses parallel algorithm and hardware. Encryption includes steps: calculating weighted summation of discrete Fresnel diffraction transform on hologram plane in virtual class from information plane and random template; digital hologram reconstruction is carried out by using 'spectrum operation'. Decryption includes steps: calculating contribution of random template in encryption procedure by using corresponding decryption parameter, then subtracting the said contribution from cryptograph to obtain light intensity on reconstruction plane from information plane so as to obtain original information image. The method is suitable to speech information processing. The device includes PC, DSP and dedicated programmable IC. System is in maser/slave mode, or embedded type. Advantages are: non-linear high security classification and flexibility.
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