SWiM: Secure Wildcard Pattern Matching

This is the implementation of our FC 2018 paper: SWiM: Secure Wildcard Pattern Matching From OT Extension[ePrint].

Evaluating on a single Intel Xeon server (2 36-cores Intel Xeon CPU E5-2699 v3 @ 2.30GHz and 256GB of RAM), ours protocol requires only 60 seconds to securely compute the Secure Wildcard Pattern Matching for text size n = 2^22 and pattern size m = 2^14

Installations

Required libraries

C++ compiler with C++14 support. There are several library dependencies including Boost, Miracl, and libOTe. For libOTe, it requires CPU supporting PCLMUL, AES-NI, and SSE4.1. Optional: nasm for improved SHA1 performance. Our code has been tested on both Windows (Microsoft Visual Studio) and Linux. To install the required libraries:

• windows: open PowerShell, cd ./libOTe/cryptoTools/thirdparty/win, and getBoost.ps1; getMiracl.ps1
• linux: cd ./libOTe/cryptoTools/thirdparty/linux, and bash all.get.

NOTE: If you meet problem with getBoost.ps1; getMiracl.ps1 or all.get which builds boost, miracl and libOTe, please follow the more manual instructions at libOTe

Building the Project

After cloning project from git,

Windows:

1. build cryptoTools,and libOTe projects in order.
2. add argument for frontend project (for example: -t)
3. run frontend project

Linux:

1. make (requirements: CMake, Make, g++ or similar)
2. for test: ./bin/frontend.exe -t

Running the code

The database is generated randomly. The outputs include the average online/offline/total runtime that displayed on the screen and output.txt.

Flags:

-t		unit test which computes the Secure Wildcard Pattern Matching for text size 2^14 and pattern size 2^9
-r		role (`-r 0` as sender, `-r 1` as receiver)		
-nn		logarithm of text size. For example, `-nn 14` means that the text size is 2^14
-n		text size
-mm		logarithm of pattern size. For example, `-mm 9` means that the text size is 2^9
-m		pattern size		

Examples:

1. Unit test:

./bin/frontend.exe -t

2. SWiM:

Compute Secure Wildcard Pattern Matching for text size 2^14 and pattern size 2^9 in semihonest setting

./bin/frontend.exe -r 0 -nn 14 -mm 9 
& ./bin/frontend.exe -r 1 -nn 14 -mm 9 

Compute Secure Wildcard Pattern Matching for text size 10000 and pattern size 256 in semihonest setting

./bin/frontend.exe -r 0 -n 10000 -m 256
& ./bin/frontend.exe -r 1 -n 10000 -m 256

Help

For any questions on building or running the library, please contact Ni Trieu at trieun at oregonstate dot edu