US Patent 9473516 Detecting network attacks based on a hash

Techniques for analyzing access to a network-based document may be provided. For example, a portion of the network-based document for hashing may be identified. A client hash of the portion may be accessed. The client hash may be based on an access of a client to the network-based document over a network. A provider hash of the portion may be also accessed. The provider hash may be based on a trusted version of the portion. The client hash and the provider hash may be compared. Based on the comparison, an issue associated with the access to the network-based document over the network may be detected.