[Redcloak]

It's very secure. However, if one has the resources of an unlisted government agency and a basement full of Cray computers at their disposal, even one time pads can be beaten. A defense would be to encrypt garbage along with the "good stuff". This wastes "Agent Smith's" valuable computer time decoding things like grocery shopping lists and your 5-year old's poetry.

[Doctor Stochastic]

No, onetime pads cannot be broken. One+epsilon time pads can be broken. See the venona pages on the internet.