Using blockchain technology, it is possible to encrypt offline data. This can be accomplished by hashing the data and storing it on a blockchain. The optimum way to encrypt offline data using blockchain will differ depending on the blockchain platform and the encryption technique utilized. However, there are some guidelines to follow. You may ensure that the data is safe from unauthorized access by using a powerful encryption technique like AES-256 and create a new blockchain account for the encrypted data. The encrypted data can then be uploaded to the blockchain and viewed using a blockchain explorer.