1. A method for detecting transmission of potentially malicious packets, comprising: receiving a plurality of packets; generating hash values, as generated hash values, based on variable-sized blocks of the plurality of packets; comparing the generated hash values to hash values associated with prior packets; and determining that one of the plurality of packets is a potentially malicious packet when one or more of the generated hash values associated with the one of the plurality of packets match one or more of the hash values associated with the prior packets.