title: Is a base64 encoded string unique?
body: <p>I can't find an answer to this. If I encode a string with Base64 will the encoded output be unique based on the string? I ask because I want to create a token which will contain user information so I need make sure the output will be unique depending on the information.</p>
  
  <p>For example if I encode "UnqUserId:987654321 Timestamp:01/02/03" will this be unique so no matter what other userid I put it in there will never be a collision?</p>