April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Encrypting queries
Sometimes, you may not want to reveal the data source and/or the input for the data source. For example: you may not want to reveal the API key in the URL if there is any. Therefore, Oraclize provides a way to store queries encrypted in the smart contract and only Oraclize's server has the key to decrypt it.
Oraclize provides a Python tool (https://github.com/Oraclize/encrypted-queries), which can be used to encrypt the data source and/or the data input. It generates a non-deterministic encrypted string.
The CLI command to encrypt an arbitrary string of text is as follows:
python encrypted_queries_tools.py -e -p 044992e9473b7d90ca54d2886c7addd14a61109af202f1c95e218b0c99eb060c7134c4ae46345d0383ac996185762f04997d6fd6c393c86e4325c469741e64eca9 ...