Schnorr Signature

• The Schnorr signature feature is a digital signature scheme that allows for multi-signature aggregation, while also providing both scaling and privacy benefits.
• From Wikipedia:

"In cryptography, a Schnorr signature is a digital signature produced by the Schnorr signature algorithm. Its security is based on the intractability of certain discrete logarithm problems. The Schnorr signature is considered the simplest digital signature scheme to be provably secure in a random oracle model. It is efficient and generates faster signatures."

• Would become possible in bitcoin under SegWit making signatures faster.