Voice authentication captures the characteristics such as cadence, frequency, pitch and tone of an individual’s voice. Voice verification works with a microphone or with a regular telephone handset, although performance increases with higher quality capture devices. The hardware costs are very low, because today nearly every PC includes a microphone or it can be easily connected one. However voice recognition has got its problems with persons who are husky or mimic another voice. Additionally the likelihood of recognition decreases with poor-quality microphones and if there is background noise. Voice verification will be a complementary technique for e.g. finger-scan technology as many people see finger scanning as a higher authentication form. In general voice authentication has got a high EER, therefore it is in general not used for identification.