this may not elucidate a clear answer, but I've heard it described as such and thought it might help:
entanglement works sort of like creating a matching pair of gloves. You can put each glove in separate boxes and ship one to New York, one to San Francisco. You open the box in New York, finding the right-hand glove and know instantly that the left-handed mate is in San Francisco.
So too bits can be entangled, and measuring one, gives you a "cheater's peek" at what the other's value is -- they're integrally linked.
This seems immensely useful regarding encryption, because in my mind, this lets you mimic the public-, private-key model on the small scale.