Bank of Finland recently published an article on cyber security and financial stability. This article can be found here: http://www.eurojatalous.fi/fi/2015/2/voisiko-kyberhyokkays-johtaa-finanssikriisiin (English version forthcoming). BIS central bankers’ speeches  3  the way we think about cyber security: cyber security should not be thought to be only a cost center, but it needs to be perceived as a business enabler.
It is relatively more straightforward to handle cybersecurity in the interbank payment ecosystem, since the access points to the payment system are limited and connections can be made using secure dedicated networks. In contrast, retail payment systems may have billions of potential access nodes and utilize standard internet connections.