Bitcoin just got its first makeover in four years

"Bitcoin’s makeover has to do with digital signatures, which you can think of as the fingerprint an individual leaves on every transaction they make.

Right now, the cryptocurrency uses something called the “Elliptic Curve Digital Signature Algorithm,” which is created from the private key which controls a bitcoin wallet and ensures that bitcoin can only be spent by the rightful owner. Taproot will switch over to something known as Schnorr signatures, which essentially makes multi-signature transactions unreadable..."