as quoted by Devi Mathieu, in Physicist Richard Muller helps prepare tomorrow’s leaders for a technological world http://berkeley.edu/news/berkeleyan/2003/02/26_.shtml, The Berkeleyan, 26 February 2003.
“If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology.”
preface to 2015 edition of Secrets and Lies
Cryptography
Context: A few years ago I heard a quotation, and I am going to modify it here: If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology.
Help us to complete the source, original and additional information
Bruce Schneier 24
American computer scientist 1963Related quotes

Stopped in Our Tracks, Book Two: Excerpts from U.G.'s Dialogues (2005) by K. Chandrasekhar

“Making… an art out of your technological life is the way to solve the problem of technology.”
NPR Interview (1974)
"Neil Postman Ponders High Tech" at Online Newshour : Online Forum (17 January 1996)
Context: Even when the problem of the access to technology is solved so that anyone who wishes can have access to technology, there still remains a problem. For example, just about anyone has access to a public library (at least in America). In that library we find the greatest, most profound, most illuminating literature that human beings have so far produced. Do most people read these books? Have you read Cervantes? Have you read the sonnets of Shakespeare? Have you read Hegel or Nietzsche? Their books are in the library, you have access to them, why have you not familiarized yourself with this literature? (Even if you have, I think you will agree that most people have not. Why?)

Group calls for ban on spying technology sales http://www.pcpro.co.uk/news/367609/group-calls-for-ban-on-spying-technology-sales (25 May 2011).

Spacetime Tsunami http://www.deoxy.org/t_sunami.htm, Interview with Carla Sinclair, bOING bOING #10.
Context: I think that people don't understand. As the Firesign Theater used to say, 'Everything you know is wrong.' But that is a very liberating understanding, because if everything you know is wrong, then all the problems you thought were insoluble can be framed differently. And there's a way to take the world apart and put it back unrecognizably. We don't really understand what consciousness is at the really deep levels. With some of the tryptamine hallucinogens, you see into possibilities where questions like, 'are you alive?' 'are you dead?' 'are you you?' seem to have been transcended. I think people have a very narrow conception of what is possible with reality, that we're surrounded by the howling abyss of the unknowable and nobody knows what's out there.

“BoP consumer problems cannot be solved with old technologies.”
Source: The Fortune at the Bottom of the Pyramid, 2009, p. 26

“Technology has solved old economic problems by giving us new psychological problems.”
Source: The Subtle Art of Not Giving a F*ck (2016), Chapter 3, “You Are Not Special” (p. 60)

From the Vintage paperback (1973), p. xvii
Propaganda: The Formation of Men's Attitudes (1965)
Context: Again I want to emphasize that the study of propaganda must be conducted within the context of a technological society. Propaganda is called upon to solve problems created by technology, to play on maladjustments, and to integrate the individual into a technological world.