source: ([tag=VBZ] [□=□] □)? □
destination: ([tag=VBZ] [tag=□] □)? □
spec: Along rivers large and small , the Federal Flood Insurance program uses maps to set rates , spread the risk , and encourage local governments to plan evacuations and control land use . As long as the signature verifies that the request legitimately came from this identity , it is considered authenticated . Of course , there 's no need to wait - you can simply surf www.google.com and scope the software out firsthand today . In other words , the philosophy quite often is that one verifies that a certain system is of the S-L types , thus having at one 's immediate disposal a concomitant list of properties of the system , properties whose qualitative nature is quite sufficient to answer the questions one had about the system in the first place . TTI verifies their estimates of delay by collecting observations in each city on actual free-flow and congested travel speeds . It 's tents and beers by the fire , but somehow it feels just as luxurious . The committee also collects and tabulates ballots during elections and verifies the results of these elections . A flexible time-and-materials contract and close working relationship with the software developer , were key to enabling this change in approach . This may argue for a longlife signature key which verifies a succession of shortlife confidentiality keys . COTS software , however , has begun to reduce our ability to easily modify systems and has moved us closer toward being servants than being masters .