cryptography task in matlab

what I want exactly is to hide a steganography text into video and audio file with using (AES,RSA) cryptographic algorithm and the reverse functionality for the operation. the all idea I'm first need to encrypt the data with ( AES or RSA) the user chose the encryption algorithm that he want. then hide in audio file or video file using LSB ( the user chose the number of bit he will used to hide) . in the other hand I can in reverse extract the data and then decrypted it ) want GUI and list options allow the user chose video or file . then after he write the text can chose the crypto algorithm to encrypt the text ( we will use two algorithm RSA and AES ) then after that he chose the number of bit to hide data in it . and also GUI shows the stego file and I can save it to do compare between it and the original file and show how much bit is change . I need to show the detail about the cover file ( audio and video ) and the same detail after hiding to prove that the size will be the same . for the tap it can be two tap one for video another for audio and i need it as application . as you see at attachment : first choose the file then write the text then show the encrypte text then show the binary bit of text to hide in image and show how much diffrent between the two file in extract : chose the file the extract the encrypted data and decrypt it Ok i will send to you file with capture Yes in the same GUI I could able to upload the cover file with the data and extract the data then decrypted. in the save I mean save the file wave. like as I do with image I have deal with Jpg to hide data in it then save the image again. after hiding . The compare will be shown in the GUI at attached file you will catch what i mean exactly I will reject high bids