The document discusses palm vein technology, which uses the unique vein patterns in people's palms for personal identification. It has high accuracy, with a false acceptance rate of 0.00008% and false rejection rate of 0.01%. Palm vein patterns are difficult to forge or steal. The technology works by capturing a snapshot of the palm veins, converting it to an algorithm, and comparing it to stored databases. It has various practical applications like ATM access and is gaining popularity due to its contactless, non-invasive nature and high security compared to other biometrics. However, it remains relatively expensive.