Method for determining an index (I) allowing search over encrypted data, performed by a device (6) for determining an index (I), comprising: - determining (S1) a set (Δ) of keywords (Wi) and first sets (ID(Wi)) of document identifiers associated with the keywords (Wi), in function of a set (D) of documents, - obtaining (S2) a set (S) of stems (si) and second sets (ID(si)) of document identifiers associated with the stems (si), in function of the set (Δ) of keywords (Wi) and the first sets (ID(Wi)) of document identifiers, and - determining (S3) an index (I) which comprises encrypted information associating the stems (si) with the corresponding second set (ID(si)) of document identifiers.
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机译：由用于确定索引（I）的设备（6）执行的用于确定允许搜索加密数据的索引（I）的方法，包括：-确定（S1）关键字（W i < / Sub>）和与关键字（W i ）关联的第一组文档标识符（ID（W i ）），以一组文档（D）为功能，-获得（S2）一组词干（s i ）和第二组（ID（s i ））与该词干（s i ），取决于关键字（W i ）的集合（Δ）和以下项的前一组（ID（W i ））的作用文档标识符，以及-确定（S3）索引（I），该索引（I）包括将茎（s i ）与对应的第二组（ID（s i ）相关联的加密信息）的文档标识符。
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