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A comparison of biometrics from: Yun, Yau Wei. The ‘123’ of Biometric Technology, 2003. Retrieved on November 21, 2005 from the World Wide Web: http://www.itsc.org.sg/synthesis/2002/biometric.pdf

From the PDF:

In the above table, universality indicates how common the biometric is found in each person; uniqueness indicates how well the biometric separates one person from the other; permanence indicates how well the biometric resist the effect of aging; while collectability measures how easy it is to acquire the biometric for processing. Performance indicates the achievable accuracy, speed and robustness of the biometrics while acceptability indicates the degree of acceptance of the technology by the public in their daily life and circumvention indicates the level of difficulty to circumvent or fool the system into accepting an impostor.