Humans are the weakest link

This morning’s Observer column:

PGP (now in its fifth incarnation) does indeed enable one to protect one’s communications from spying eyes. It meets Snowden’s requirement for “strong crypto”. But it hasn’t realised its revolutionary potential because it turns out that powerful software is a necessary but not sufficient condition for effective security. And the reason is that, to be effective, PGP has to be implemented by humans and they turn out to be the weak link in the chain.

This was brought forcibly home to me last week at a symposium on encryption, anonymity and human rights jointly organised by Amnesty International and academics from Cambridge University…

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