One of biometrics technology which is used in security systems recently is DNA biometrics. It is impossible to fake this characteristic because each person's DNA is unique. Each person's DNA contains some trait from his/her parents. Each cell in the human body contains a copy of this DNA. DNA profiling will decide the amount of VNTR (variable number tandem repeat) which repeats at a number of distinctive loci. These amounts of VNTR will make up an individual's DNA profile.

In order to collect DNA from each person, the system needs time and goes through several complex steps. Firstly, it needs to collect the DNA from a physical sample of each user such as blood, saliva, hair, semen, tissue and others. Then, it needs to break down the samples into small fragments which contain VNTR. Next, the size of each DNA fragment will be measured and sorted before it is compared to different samples.

DNA biometrics technology is highly unique and the chance of two individuals having the exact same DNA profile is extremely impossible, but this technology is still new and is hardly applied in public. It also requires lots of expensive equipment in order to break down the DNA successfully and analyze the unique features of DNA and create a DNA profile. Furthermore, the system will need to get physical samples (hair, blood, etc.) from users to collect their DNA data. Another factor that makes this system highly unused is time. The system requires long periods of time to go through all the processes of creating a DNA profile for each individual and verifying each individual's individual DNA profile. Due to these limitations and barriers, DNA biometrics is not used nearly as much as facial, iris, vein or voice recognition biometric systems. In near future, there will be solutions for these problems and we can actually apply this unique and better biometrics technology in our daily life.