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Advances in technology - hugely beneficial though they are - render us vulnerable in new ways. For instance, our interconnected world depends on elaborate networks: electric power grids, air traffic control, international finance, just-in-time delivery, and so forth.

I understood the importance in principle of public key cryptography but it's all moved much faster than I expected. I did not expect it to be a mainstay of advanced communications technology.

Communications is the biggest driver of frequency of use of anything. Think about how many times a day you check your email on your phone or text someone or message someone.

A security cam is one small part of a much larger universe of cams. The much larger effect, socially, politically and economically, is going to come from a much larger trend.

I have seen that technology has contributed to improved communication, that it's contributed to better health care, that it's contributed to better food supplies, that it has contributed to all the basic human needs.

There are a lot of things that need to be done to improve communications.

The decisions we make about communication security today will determine the kind of society we live in tomorrow.

I am still cautiously hopeful about the potential of the Internet. But it seems that the greatest revolution in communication has been hijacked by commercial values.

Technology gives us the facilities that lessen the barriers of time and distance - the telegraph and cable, the telephone, radio, and the rest.

The benefits of our increasingly digital lives have been accompanied by new dangers, and we have been forced to consider how criminals and terrorists might use advances in technology to their advantage.