So, today I started to check for some information about authentication credentials...I started to read about HTTP basics on URL parameters...trés básique! ...but then I turned around the question, as soon as I understood that UTF 8 encoding is usually manipulated, and usually by binary files (where all encryption relies) encoding, whatever the languague...and also usually , images...besides text...to finally reach this question " Read both text and binary data from InputStream [duplicate]" (google it) and to end up here

Read a specific byte from binary file

http://stackoverflow.com/questions/11545039/read-a-specific-byte-from-binary-file