Scientists are trying to identify us with as many ways as possible. So far, they have used fingerprints, footprints, eyes, voice, walking patterns and DNA that I can remember right now. Apparently those ways are not enough, they are now trying to identify us using our heartbeat. Each heartbeat is unique, it follows an irregular pattern that is repeated. A unique key can be generated based on that pattern which can be used to encrypt binary data. This will help us to encrypt our data without the need to remember passwords but there are many disadvantages. First of all, you can’t change the key, once someone successfully find it then he can access your data and you can’t do anything about it. Secondly, if you have an arrhythmia or problems with your heart you will not be able to access your data because the pattern will probably change. I want to believe that I am not the only one that thought about those problems and scientists will take them into consideration when creating the key. This is very interesting and we will see how they will use those patterns in the near future.