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By using watermarking, Cryptography and steganography Research papers.
So you want your image to sent secretly..
I advice you to go for the Steganography.,because In Watermarking,Cryptography the intruder knows that there is something present(watermarking-underlying/bolding/first letter/etc..,Crptography-some symbols will be replaced)
In Steganography the intruder can't see the anything interesting.,he sees the data is normal as before.,
You can mail me at for further details
I have done the project based on Steganography with3 levels of security
LSB's in only single plane-So that the pixel value doesn't effect much
Password-if intruders tries to open, the data will be crashed
Memory- the memory size will be constant
By using any cloud service like Google Drive or Dropbox
Through FB,Whatsapp,email etc.