Research: Multi signature aggregation

Here are links for further investigation of multisignature aggregation problem

t-ECDSA

Threshold ECDSA — Safer, more private multi-signatures

BLS

Great research with timings

Pragmatic signature aggregation with BLS

P.S. there are useful links in comments

Implementation

GO

BLS-Multisignature

C/C++/Java/Python/etc...

List of Pairing Libraries

Distributed key generation

GO

Distributed key generation

Key Shardings

Secure and Distributed Secret Key Sharding: FUSION Foundation

Other links

Ethos Universal Wallet

BLS

FUSION Foundation's WP

Verifiable secret sharing

Distributed key generation

Threshold cryptosystem

Pairirng: basic theory

Theory

March 24, 2018 BLS Multi-Signatures With Public-Key Aggregation

Attractive Subfamilies of BLS Curves for Implementing High-Security Pairings

Compact Multi-Signatures for Smaller Blockchains

Distributed Key Generation in the Wild