Can the data stored in a block modified once it is written? If so, why? › Category: Blockchain › Can the data stored in a block modified once it is written? If so, why? 0 Vote Up Vote Down Editor">Editor Staff asked 2 years ago Can the data stored in a block modified once it is written? If so, why? 1 Answers 0 Vote Up Vote Down Editor">Editor Staff answered 2 years ago The data stored on the blockchain is protected with proper encryption using a digital signature. This makes the data written in a block as a one-time process only. It cannot be altered by any means.