Tonight on the BBC's Watchdog programme http://www.bbc.co.uk/news/uk-19562487 they discuss a new high tech technique to steal BMW cars, in the report it quotes BMW as saying "Certain criminal threats, like the one you have highlighted, simply do not exist when cars are designed and developed." This demonstrates some of the problems faced in security, the landscape is constantly changing with the criminal able to take new products and reverse engineer criminal solutions. It also highlights when tackling design, security should be designed in and a threat analysis conducted, the ability to program replacement keys is a security weakness and measures need to be included in the project definition and the product specification to try and do this.
I am not saying BMW failed to consider security but it does show how difficult it can be to design a secure product.
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