taproot(redirected from Tap root)
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the large single root of plants such as the dandelion, which grows vertically downwards and bears smaller lateral roots
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A root system in which the primary root forms a dominant central axis that penetrates vertically and rather deeply into the soil; it is generally larger in diameter than its branches.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
TaprootThe first major upgrade to Bitcoin since SegWit in 2017. Launched November 16, 2021, Taproot is a Bitcoin soft fork that improves privacy and efficiency. It also improves privacy for Layer 2 Bitcoin chains (see Lightning Network). Taproot enhances Bitcoin scripting, which takes it one step closer to providing more versatile smart contracts in the future (see Bitcoin smart contract).
Schnorr Signatures (BIP-340)
Taproot uses the Schnorr algorithm, which combines multiple digital signatures into one, thus hiding their identities and creating a more private transaction. Multiple unspent transaction outputs (UTXOs), which are the records of spendable Bitcoins for each coin owner, are merged into a single, smaller transaction.
When Bitcoin was launched in 2009, the Schnorr signature was protected by patents, and thus the ECDSA digital signature algorithm was used exclusively until Taproot. See ECDSA and Bitcoin transaction.
New Pay-to-Taproot (P2TR) spending rules are more private because complex multi-signature transactions appear the same as simple transactions with one signature. Merkelized Alternative Script Trees (MAST) enables locking UTXO outputs to multiple scripts that are compressed via hashes in a tree hierarchy (Merkle tree).
Tapscript provides new op codes for Bitcoin transaction scripts that implement Pay-to-Taproot (P2TR). Tapscript scripts verify Taproot spending and Schnorr signatures. See Bitcoin.
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