LTT has been awarded a patent on the use of printed audio (Soundpaper or any other encoding) with voiceprints for audio identification purposes. An ID-card issuer could pair a photo with a Soundpaper strip embedded with a recorded passphrase. The bearer of the ID card speaks the passphrase into a scanner, which compares both the content and the speaker’s unique voiceprint with the passphrase recorded in the Soundpaper strip.
Because a Soundpaper strip is very dense and flexible, it can also contain fingerprint information that can be compared with a fingerprint scan.
This three-way combination (face, finger and voice) provides robust identity verification without any requirement for internet access — an ideal solution for remote, high-security locations.