Whatwebelievetobeanewtechnique,basedonamodifiedGerchberg–Saxtonalgorithm(MGSA)andaphasemodulationschemeintheFresnel-transformdomain,isproposedtoreducecrosstalksexistinginmultiple-imageencryptionandmultiplexing.First,eachplainimageisencodedandmultiplexedintoaphasefunctionbyusingtheMG