How does string theory discribe mass?

mass is due to the speed the strings are moving (vibrations, not through space).  using quantum mechanics, the faster something moves, the more mass it has.  that was the one I found easy to understand.  don't ask me about electromagnetism, inertia,  strong nor the weak forces.

The mass is depend on the frequency of the vibration.  The higher the frequency, the more energy it has, the more massive the particle.

11 dimensional string theory, (and 26 dimensional M theory), has not produced anything.

It is possible that the extra 7 dimensions of space in string theory, (that are not perceived), are mathematical deception that first appeared with 5 dimensional Kaluza-Klein Theory.

String theory is possibly deception involving adding dimensions of space to the already existing 3 dimensions of space one dimension at a time at 90 degree angles to the previous dimension.

That string theory is possibly invalid is stated at the end of the wikipedia article on string theory.