<p>Threshold signature, as a privacy-preserving distributed signature, has become the underlying technology in various fields over the last decade. It is useful to protect against a single point of failure and can effectively ensure key security. In recent years, many different digital signatures have been thresholded and many new techniques, algorithms, and protocols have been proposed. This paper introduces the mainstream threshold signature schemes based on the signatures by several standards. We comprehensively investigate various aspects of these threshold signature schemes for comparison and evaluation, and provide the relevant applications and more potential directions for threshold signature.</p>