| 摘要 |
<p>Filtering device and method for maintaining a stream of coded Inputs/Outputs. The present invention describes a maintaining filtering method and device intended for processing a stream of m encoded incoming messages Esj each comprising nj Inputs/Outputs esi,j, a checksum ?Sesi,j of signatures Sesi,j, and a date dj, so as to generate on the basis of each incoming message Esj an outgoing message Esmj comprising nj Inputs/Outputs esmi,j, a checksum ?Sesmi,j of signatures Sesmi,j, and the date dj, said maintaining filtering device according to the invention being characterized in that it is capable of maintaining at least one state of at least one Input/Output esi,j of at least one of said incoming messages Esj during a time period ?i regardless of the state of an Input/Output of an incoming message following said incoming message Esj by generating at least one outgoing message characterized in that the state of the ith Input/Output of the outgoing message is equal to the Input/Output state esi,j of the incoming message Esj, said maintaining filtering device comprising:- a calculation device capable of calculating for each incoming message Esj on the basis of said checksum ?Sesi,j and by adding at least one compensation to said checksum ?Sesmi,j, a checksum ?Sesmi,j intended to characterize the outgoing message Esmj; - at least one pseudo random generator, a current state of which is intended for the calculation of said compensation; - at least one compensation table intended for the calculation of said compensation.</p> |
