Sotheby's to auction Picasso painting together with NFT

After auctioning high-profile NFTs for millions of dollars, Sotheby's is now using an NFT in a novel way: to digitally "secure" a Picasso painting.

NFTs, or non-fungible tokens, are a type of cryptocurrency that reside on a smart contract platform, typically Ethereum. Each NFT is unique and is impossible to replicate — a...