If you are wondering about generating keys with Threshold Signature, this article is for you. Today we will talk about the Threshold signature scheme. Let's find out more by reading this article.
What do you mean by the Threshold Signature scheme?
Threshold Signature Scheme or TSS is a digital signature protocol used by multi-party computation (MPC) wallets to authorize transactions. It is the preferred solution for many businesses and organizations as it provides increased security for transactions.
How do digital signature schemes work?
At the heart of blockchain and cryptocurrencies is the concept of digital signatures. At a basic level, a digital signature consists of a pair of keys: a private key and a public key. These keys are large numerical values used to encrypt and decrypt data.
What Is Multi-Party Computation?
Multi-party computation (MPC) is a cryptographic technique used for blockchain key management. With MPC, the private key is derived from a single key fragment (or share) generated independently by multiple untrusting parties (or nodes), without sharing the data. This means that in essence, MPC is a keyless technology, as there is no private key shared on the network, only the individual key shares together constitute a signature.
How Does Threshold Signature Scheme Work with MPC?
A threshold signature scheme is a digital signature scheme in which the KeyGen and Sign algorithms are distributed among multiple parties.
In TSS, certain criteria, ie thresholds must be met in order to authorize a transaction. The threshold refers to the number of key stakeholders that can sign up on behalf of the entire group. The general rules or access structures of TSS are often referred to as "t of n ''.
For example, suppose you have a set of 7 active signers (n).
For a successful key transaction (access), a threshold or number of signers (t) must be met. In this case, 4 is assumed.
Therefore, t of n = 4 of 7 signers.
The transaction is approved when any four active signers provide their share of the key. Since there is no way of knowing which four signers signed, security and privacy are ensured.
So I hope now you will understand What do you mean by threshold signature scheme & MPC and the threshold signature scheme (TSS). Signing with TSS is more efficient than other key management systems because it generates only one signature instead of multiple signatures like multi- sig.
