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Does the Merkle Root Contain Any Private User Data?

No, the Merkle Root is a cryptographic hash, a fixed-size string of characters that is the output of hashing the transaction data. It is impossible to reverse-engineer the original transaction data or any private user information (like wallet addresses or amounts) from the Merkle Root alone due to the one-way nature of the hash function.

What Is the Difference between the Merkle Root and the Block Hash?
What Makes the ECDSA Process “One-Way” and Why Is This Critical for Security?
How Does a Cryptographic Hash Function like SHA-256 Differ from an Encryption Algorithm?
How Is the Merkle Tree Root Hash Used to Prove the Inclusion of a Transaction in a Block?