An iris code for instance takes up only 512 bytes. P resently when we use card identification for proof, in most instances, people are verifying pictures or signatures. With biometrics, machines will be doing the tireless work at a greater rate of accuracy. With the biometrics system the criminals will no longer have the chance to exploit the system. D isadvantages of biometrics are that people fear it is an invasion of their privacy .
People are sensitive about knowledge about themselves being disclosed.
You must be certain that the person scanning you has your consent and will safeguard your information. Secondly, there is much cost and complications into putting in a new system. There is a debate as to whether to use one technology with many applications, centralization, or if we should use multiple biometrics, balkanization. In balkanization , there are many applications but they are not used in one system. There are several systems, scanning several different traits depending on the situation.