Cryptology ePrint Archive: BibTeX Citation of Report 2021/1438

    author       = {Yiping Ma and
		    Ke Zhong and
		    Tal Rabin and
		    Sebastian Angel},
    title        = {Incremental Offline/Online PIR (extended version)},
    howpublished = {Cryptology ePrint Archive, Report 2021/1438},
    year         = {2021},
    note         = {\url{}},

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.

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