title: How can I create an encryptor and decryptor that contains only letter and numbers?The same as this (ABQIAAAA5SlC01zPdiQe2c6gr56AAhSc)
body: <p>Hi how can I <strong>encrypt</strong> and <strong>decrypt</strong> strings.
  And the output of the encrypted string is alphanumeric and doesn't contain any special characters.Same as this example.</p>
  
  <p>ABQIAAAA5SlC01zPdiQe2c6gr56AAhScFBH9YSIKcAjU8YFSuTREdFBSWYOldpPAPQqWTfiiPcWJL6ddpLw.</p>