Defence always lags behind offence in electronic warfare.
Offence cannot serve as an effective deterrent since the root of an attack can be disguised and counterstrikes may be provoked against a third party by means of clever deception.
As much as 'national security' experts and military/intel bureaucrats with a strong sense of their own importance may hate this;
the one way out of the (still smallish) mess which looks most realistic and most promising to me is a decentralised reduction of vulnerability (decoupling networks, incompatibilities, more custom variations of source codes instead of standard source codes, no-write memories, manual supervision).
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