Patent ID: 7257838
Filing Date: 2007-08-14
Classification: H04L

Abstract:
1. An information processing system comprising: a protocol pass-preventing device provided between a data transmission side and a data reception side, for causing only a predetermined protocol to pass through said protocol pass-preventing device; a writing section, provided on said data transmission side, for writing a first protocol which cannot pass through said protocol pass-preventing device in a data area of a second protocol which can pass through said protocol pass-preventing device; an extraction section provided on said data reception side, for extracting said first protocol which cannot pass through said protocol pass-preventing device from said data area of the second protocol which can pass through said protocol pass-preventing device; and a judgment section for judging as to whether or not said first protocol which cannot pass through said protocol pass-preventing device is present in a data area of said second protocol which can pass through said protocol pass-preventing device is provided on the data reception side, wherein said transmission side transmits, to said reception side via said protocol pass-preventing device, said second protocol which can pass through said protocol pass-preventing device, the first protocol which cannot pass through said protocol pass-preventing device being written in the data area of the second protocol.