Assume we want to use a hash function with output length as small as possible, subject to being collision resistant against a birthday attack running in time 2192. which hash function would be the best choice?
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Suppose the population of the world is 6 billion, and that there is an average of 1000 communicating devices per person. how many bits are required to assign a unique host address to each communicating device? suppose that each device attaches to a single network and that each network on average has 10000 devices. how many bits are required to provide unique network ids to each network?
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