Our Bitcoin QR code generator helps make this process simple and reliable. With the help of portals like Live Bitcoin News you can make things better and search easy as far as the reliable Bitcoin company is concerned. If we go as far as doing signature aggregation we can do pretty much anything with just a single signature for the entire transaction. Choose some combination of keys and provide a single signature with it. Q - With signature aggregation we only have one signature for youtu.be the whole transaction. How would signature aggregation would in practice? Signatures right now contain the actual ECDSA signature with concatenated to it the sighash type. Unfortunately it would be highly inefficient for key tree signatures.