The immutability of blockchain transactions is both a blessing and a curse. BAYC phishing. PolyNetwork attack. Harmony Bridge compromise. Ronin theft. $14 billion of crypto stolen in 2021 alone. These - and so many more - are undeniable thefts, but there’s no “undo button” (ex. credit card payment reversals), and not everyone has a Jump Crypto to bail them out if needed. But what if there was a reversible type of token? This is the question that a few of us at Stanford (Dan Boneh, Qinchen Wan...

The immutability of blockchain transactions is both a blessing and a curse. BAYC phishing. PolyNetwork attack. Harmony Bridge compromise. Ronin theft. $14 billion of crypto stolen in 2021 alone. These - and so many more - are undeniable thefts, but there’s no “undo button” (ex. credit card payment reversals), and not everyone has a Jump Crypto to bail them out if needed. But what if there was a reversible type of token? This is the question that a few of us at Stanford (Dan Boneh, Qinchen Wan...