create inverted index which consist of words mapping to files contain this words. then i want to encrypt this inverted index by using some encryption algorithm.
I think there are several types of block encryption, hybrid encryption, symmetric encryption, and protocol encryption
Is it correct to say that there is a mapping f from words w to indices i:
f(w) =i
Then you have an inverted mapping:
f**(-1)(j) = {w', such that f(w') =j}.
You want to encrypt f**(-1)?
Can you be more precise on how the implementation you use defines f**(-1)?
[I have no exponent sign here so the inverted function is denoted by **(-1) "to the power - 1]
hi,
Kindly check:
https://insight-centre.org/sites/default/files/publications/secureinvertedindexbasedsearch.pdf
U can survey on encryption methods.many methods are available, u can chose any of them to proceed
Additional idea: I see other contributors to your discussion saying you should try methods, but maybe they don't say why or how.
Here is one way more specific for your problem.
You surely have as a data structure in your programme a table associating indices and words. Start by encrypting this table. After all, protecting sensitive data against unauthorised access is always sound.
Now this is step 1, because it assumes the access is either all (the full table) or none (zero access).
In real life, not all people or agents need to see everything, so you'll go for step 2:
-partition words and indices in subsets of associations of words and indices.
-encrypt subsets
In this way access is granted to those who need to know only...
Does it help?
My suggestion is to use some advanced processes like Genetic algorithm's operators (Crossover, Mutation e.t.c.), Random number concept and neural network concept with basic encryption methods ( DES, AES).
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