February 2020
Beginner
621 pages
19h 34m
English
book
Introduction to Cryptography with Coding Theory, 3rd Edition
by Wade Trappe, Lawrence C. Washington
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22.6 Keyword Search
Alice runs a large corporation. Various employees send in reports containing secret information. These reports need to be sorted and routed to various departments, depending on the subject of the message. Of course, each report could have a set of keywords attached, and the keywords could determine which departments receive the reports. But maybe the keywords are sensitive information, too. Therefore, the keywords need to be encrypted. But if the person who sorts the reports decrypts the keywords, then this person sees the sensitive keywords. It would be good to have the keywords encrypted in a way that an authorized person can search for a certain keyword in a message and determine either that the keyword is present or not, ...
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