BSSPD: A Blockchain-Based Security Sharing Scheme for Personal Data with Fine-Grained Access Control

Algorithm 4

Register.

 Input: account, id

 Output: bool

1 ifmsg.sender is not _selfthen

2 throw;

3 else

4 u = account_idx.find(account);

5 ifu==nullthen

6  return false;

7 else

8  u.uid=id;

10  account_idx.modify(u);

11  return true;

12 end

13 end