Lucas wrote: > I do it because I want to encrypt a string into a picture using RSA > algorithm.
what does "into" mean? are you supposed to encrypt the binary data representing the JPEG image, or embed a message into the actual image? > so I first convert the string to binary,and then saving the binary > into picture you seem to have a rather fuzzy understanding of the words "string" and "binary" here. if you read from a file that's opened in binary mode, you get an 8-bit string that contains the binary data. there's no need for any conversion here; just use the data you got from "read". > finally, print the picture by binary! do you mean "save the picture to a binary file", or something else? </F> -- http://mail.python.org/mailman/listinfo/python-list
