This is our full implementation for our MAPLE paper (PETS 2023, Issue 4).

WARNING: This is an academic proof-of-concept prototype and has not received a careful code review. This implementation is NOT ready for production use.

1. ZeroMQ

2. EMP-Toolkit

You can run the script file auto_setup.sh to automatically install the required libraries and build source code.

sudo ./auto_setup.sh 

Go to the folder Server and folder Client then execute:

make clean make 

This is going to create executable files Server in Server folder and Client in Client folder.

1. Create database and copy it into the Client folder.

$ cd BloomFilterKeywordSearch $ ./BloomFilterKeywordSearch $ cp omat.bin ../OMAT/Client/ 

The configuration of Bloom filter and database size can be modified in Preprocessing.h then rebuild.

2. Launch server:

$ cd OMAT/Server $ ./Server <Server_ID> <Server_Port> 

For example, we launch server 1:

./Server 1 12345 

Then launch server 2:

./Server 2 12345 

3. Launch client:

$ cd OMAT/Client $ ./Client [-b <Bloom_Filter_Size>] [-n <Number_of_Documents>] 

The default parameters: Bloom_Filter_Size is 16384, Number_of_Documents is 65536.

For example:

./Client -b 1120 -n 1024 

You can start server/client applications in any order.

To measure document update performance, comment the line #define RUN_SEARCH 1 in both Client.cpp and Server.cpp then rebuild and run.

Change the constant defined at line 23 const int nP = 2; in file OMAT.hpp, and at line 21 in file Client.hpp then recompile both Server and Client.

To run experiments with EC2 instances, we need to change the IP loopback 127.0.0.1 to the IP addresses of EC2 servers as follows.

1. Server: add/modify servers' IP addresses from line 13 in file OMAT/EMP_Toolkit/emp_agmpc/cmpc_config.h and recompile Server.

const static char *IP[] = {"" , "127.0.0.1" , "127.0.0.1"}; 

2. Client: add/modify servers' IP addresses at line 91 string ip_addresses[nP] = {"127.0.0.1", "127.0.0.1"}; in file Client/Client.hpp and recompile Client.

If the code is found useful, we would be appreciated if our paper can be cited with the following bibtex format

@inproceedings{le2023maple, title={{MAPLE: A Metadata-Hiding Policy-Controllable Encrypted Search Platform with Minimal Trust}}, author={Tung Le and Thang Hoang}, booktitle={Proceedings on Privacy Enhancing Technologies Symposium (PETS)}, issue={4}, pages={184-203}, year={2023} } 

For any inquiries, bugs, and assistance on building and running the code, please contact me at tungle@vt.edu.