"There is no way anybody could see which numbers you are looking at. You see typing numbers but you don't know what the pattern is because each number is here six times," Hope said during a demonstration.
Backup from Body Parts
Biometric data offers another alternative to seas of numbers, letters and symbols. US giant Apple has already equipped its latest generation iPhone with a fingerprint reader to boost its security profile.
But a group of European hackers, the Hamburg-based Chaos Computer Club, demonstrated that the system could be pirated using a sophisticated "fake" fingerprint made of latex.
Japan's Fujitsu turned to the other end of the hand and has developed an identification system based on each person's unique vein pattern. At its CeBIT stand, the company was showing off its PalmSecure technology on its new ultra-light laptop computer which has a small sensor built in.
Meanwhile Swiss firm KeyLemon has developed a face recognition system using a webcam. The computer registers parts of the face, "the eyes, the eyebrows, the shape of your nose, your cheekbones, the chin..." a company spokesman said. The person must then only sit in front of the screen to be recognized and gain access to the computer.
The system, already used by some three million people according to the company, still has a few kinks however so users must remember to take off their eyeglasses, for example, or have consistent lighting in order to pass the identity test.
"Face recognition and fingerprint recognition are additional safety security features, they will never have only face recognition or fingerprint recognition" but rather use them as a crucial backup to passwords, he said.