I have one problem with keytool, I donwloaded the last java sdk update the 1.8.0_71 and the first the command as you put in the guide keytool" doesn't work with the " but without them the program runs until ask the Enter keystore password, here the prompt doesn't allow me write letters neither numbers, I work under Windows 10, where is the problem?
SOLVED, I made it with jre1.8.0_71 and no " after of keystore program.