MP-SPDZ/CHANGELOG.md

The changelog explains changes pulled through from the private development repository. Bug fixes and small enhancements are committed between releases and not documented here.

0.1.6 (Apr 2, 2020)

• Bristol Fashion circuits
• Semi-honest computation with somewhat homomorphic encryption
• Use SSL for client connections
• Client facilities for all arithmetic protocols

0.1.5 (Mar 20, 2020)

• Faster conversion between arithmetic and binary secret sharing using extended daBits
• Optimized daBits
• Optimized logistic regression
• Faster compilation of repetitive code (compiler option -C)
• ChaiGear: HighGear with covert key generation
• TopGear zero-knowledge proofs
• Binary computation based on Shamir secret sharing
• Fixed security bug: Prove correctness of ciphertexts in input tuple generation
• Fixed security bug: Missing check in MASCOT bit generation and various binary computations

0.1.4 (Dec 23, 2019)

• Mixed circuit computation with secret sharing
• Binary computation for dishonest majority using secret sharing as in FKOS15
• Fixed security bug: insufficient OT correlation check in SPDZ2k
• This version breaks bytecode compatibilty.

0.1.3 (Nov 21, 2019)

• Python 3
• Semi-honest computation based on semi-homomorphic encryption
• Access to player information in high-level language

0.1.2 (Oct 11, 2019)

• Machine learning capabilities used for MobileNets inference and the iDASH submission
• Binary computation for dishonest majority using secret sharing
• Mathematical functions from SCALE-MAMBA
• Fixed security bug: CowGear would reuse triples.

0.1.1 (Aug 6, 2019)

• ECDSA
• Loop unrolling with budget as in HyCC
• Malicious replicated secret sharing for binary circuits
• New variants of malicious replicated secret over rings in Use your Brain!
• MASCOT for any prime larger than 2^64
• Private fixed- and floating-point inputs

0.1.0 (Jun 7, 2019)

• CowGear protocol (LowGear with covert security)
• Protocols that sacrifice after than before
• More protocols for replicated secret sharing over rings
• Fixed security bug: Some protocols with supposed malicious security wouldn't check players' inputs when generating random bits.

0.0.9 (Apr 30, 2019)

• Complete BMR for all GF(2^n) protocols
• Use your Brain!
• Semi/Semi2k for semi-honest OT-based computation
• Branching on revealed values in garbled circuits
• Fixed security bug: Potentially revealing too much information when opening linear combinations of private inputs in MASCOT and SPDZ2k with more than two parties

0.0.8 (Mar 28, 2019)

• SPDZ2k
• Integration of MASCOT and SPDZ2k preprocessing
• Integer division

0.0.7 (Feb 14, 2019)

• Simplified installation on macOS
• Optimized matrix multiplication
• Data type for quantization

0.0.6 (Jan 5, 2019)

• Shamir secret sharing

0.0.5 (Nov 5, 2018)

• More three-party replicated secret sharing
• Encrypted communication for replicated secret sharing

0.0.4 (Oct 11, 2018)

• Added BMR, Yao's garbled circuits, and semi-honest 3-party replicated secret sharing for arithmetic and binary circuits.
• Use inline assembly instead of MPIR for arithmetic modulo primes up length upt to 128 bit.
• Added a secure multiplication instruction to the instruction set in order to accommodate protocols that don't use Beaver randomization.

0.0.3 (Mar 2, 2018)

• Added offline phases based on homomorphic encryption, used in the SPDZ-2 paper and the Overdrive paper.
• On macOS, the minimum requirement is now Sierra.
• Compilation with LLVM/clang is now possible (tested with 3.8).

0.0.2 (Sep 13, 2017)

Support sockets based external client input and output to a SPDZ MPC program.

See the ExternalIO directory for more details and examples.

Note that libsodium is now a dependency on the SPDZ build.

Added compiler instructions:

• LISTEN
• ACCEPTCLIENTCONNECTION
• CONNECTIPV4
• WRITESOCKETSHARE
• WRITESOCKETINT

Removed instructions:

• OPENSOCKET
• CLOSESOCKET

Modified instructions:

• READSOCKETC
• READSOCKETS
• READSOCKETINT
• WRITESOCKETC
• WRITESOCKETS

Support secure external client input and output with new instructions:

• READCLIENTPUBLICKEY
• INITSECURESOCKET
• RESPSECURESOCKET

Read/Write secret shares to disk to support persistence in a SPDZ MPC program.

Added compiler instructions:

• READFILESHARE
• WRITEFILESHARE

Other instructions

Added compiler instructions:

• DIGESTC - Clear truncated hash computation
• PRINTINT - Print register value

0.0.1 (Sep 2, 2016)

Initial Release

• See README.md and tutorial.md.