Data retrieval on encrypted documents is a very important technology in cloud storage, where encryption on\nsensitive data is a necessary operation to protect documents privacy before they are outsourced to cloud. Most of\nexisting searchable encryption schemes concentrate on single-user scenario. In this paper, we focus on the multiple\nsender and multiple user application scenario to provide a flexible search authorization searchable encryption (SE)\nscheme. The attribute based encryption (ABE) technology is used to support fine-grained access control and the\nsynonym keyword search is enabled in the new scheme. The new primitive is named as attribute based searchable\nencryption with synonym keyword search function (SK-ABSE). The formally definition of SK-ABSE is given together\nwith a concrete construction. This scheme also enables convenient user revocation mechanism.
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