Abstract
The distributed nature of Wireless Sensor Networks leads to the use of cloud databases that need to be protected when dealing with sensitive content. In this context, Searchable Symmetric Encryption provides the appropriate framework to perform secure searches. This work proposes a combination of secure indexes with Bloom Filters to efficiently address searches in encrypted content. We evaluate the performance of two different strategies to populate Bloom Filters in XM1000, Z1 and TelosB wireless sensor devices: (1) we first consider four cryptographic hash functions using the double hashing technique and truncating message digests; (2) we then select five symmetric encryption algorithms and two fast hash functions also with double hashing. We conclude that the best strategy for securing indexes is AES plus a fast FNV hash function and double hashing.
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