This book presents a holistic view on compiler assisted practical secure
multi-party computation (MPC) over Boolean circuits. It discusses that
two or more parties jointly evaluate a function over their inputs in
such a way that each party keeps its input unknown to the other parties
in MPC. MPC provides a generic way to construct Privacy-Enhancing
Technologies, which protect sensitive data during processing steps in
untrusted environments. A major obstacle in the past was to generate MPC
applications by hand. Recently, special compilers have been developed to
build all kinds of applications.
This book also explains in detail how efficient MPC applications can be
created automatically from ANSI-C, thus, bridging the areas of
cryptography, compilation and hardware synthesis. It also gives an
insight into the requirements for creating efficient applications for
MPC and is hence of interest to not only researchers in the area of MPC
but also developers realizing practical applications with MPC. For a
better understanding of the complete compile chain from ANSI-C to
circuits, which is the 'machine code' of MPC, the authors first give the
necessary background information on MPC protocols, Boolean logic, and
logic synthesis. Then the authors describe the various compilation steps
required to translate any code into an adequate circuit description.
Afterwards, the authors introduce a variety of optimization techniques
for two classes of MPC protocols, namely techniques that improve the
runtime of applications in constant- and multi-round MPC protocols. The
authors also illustrate how efficient parallelization of MPC protocols
can be achieved using the assistance of compilers. It presents the
effectiveness of the proposed techniques by giving a detailed evaluation
on benchmarking applications. Most of the aforementioned techniques are
implemented in our open source compiler that is accompanying this book
and allows to study compilation for MPC in practice.Researchers who are
interested in practical secure multi-party computation (MPC), and
developers who are interested in realizing MPC applications in practice
will find this book useful as a reference, as well as advanced-level
students in computer science.
