Server side:
 35 def identify(code)
 36   qrKey = "ABCD123"
 37   p "Encrypted qrcode #{code}"
 38   clearText = AESCrypt.decrybsodium javascrypt - Google Searchpt(code,qrKey)
 39   p "Decrypted qrcode #{clearText}"
 40 end
 41
 42 get '/validate' do
 43 encoded_qrcode = params[:encryptedQR]
 44 #qrcode = Base64.decode64(encoded_qrcode)
 45 #p "Decoded QRCODE #{qrcode}"
 46 identifyQR(encoded_qrcode)
 47 end

Client Side:

39 myApp.config(['$cryptoProvider', function($cryptoProvider){
 40   $cryptoProvider.setCryptographyKey('ABCD123');
 41 }]);
 42
 43 myApp.controller('encryptCtrl', ['$scope','$crypto','$http', function($scope, $crypto, $http) {
 44   var encrypted = $crypto.encrypt('Hello World');
 45   //var decrypted = $crypto.decrypt(encrypted);
 46   alert('Encrypted: '+encrypted);
 47   console.log('Encrypted: '+encrypted);
 48   $http.get('http://../validate?encryptedQR='+encrypted)
 49   alert('Decrypted: '+decrypted);
 50   //console.log("Manual decryption: "+$crypto.decrypt("U2FsdGVkX183AH6U7Iome7flZaeoag0dcZDNY5hpEuA="));
 51 }]);