But this is no 'firewall' for a country who needs to raise 300bn euros in the markets in 2012 alone.

BBC: The great shakedown in Cannes

Enterprise IT needs to make no changes to the firewall or DMZ.

FORBES: Advantages of the MobileSpan Approach

No single person knew the whereabouts of all the documents, in order to create a security firewall.

BBC: Warsaw Ghetto: The story of its secret archive

The near-term measures that need to be approved by the summit are no secret: reduce Greece's mountainous debt, recapitalise vulnerable banks and create a credible firewall to protect endangered but still-solvent countries like Spain and Italy.

ECONOMIST: Charlemagne