Trusted Blockchain-Based Signcryption Protocol and Data Management for Authentication and Authorization in VANETs

Algorithm 4

Authentication

Input:, ,

Output: true or false

Function unSignCrypted Input(, ) Output(true or false)

  {

   '' || '' = unsigncrypt();

   if('' == 0) {

    '' = '';

   }

   '' = Method.unsign('', );

   '' = homomorphicEncryption.Dec('');

   '' = Method.hash('');

   if('' == '') {

    statu_code = true;

   } else {

    statu_code = false;

   }

  }

  statu = select();

  if(statu !==0) {

   Get cryptographic Method = new cryptographic (CryptoType.SCHNORRTYPE);

   '' = result.getValue2();

   '' = result.getValue3();

   '' = || || '';

   '' = Method.hash('');

   '' = Method.sign('', '');

   statu_code = function.unSignCrypted(, );

  } else {

    statu_code = false;

   }

  return statu_code;