Biometric system and techniques suitable therefor

A biometric system eliciting a migrating biometric characteristic from individuals, the system comprising:

• a biometric information repository storing at least first and second templates of at least one migrating biometric characteristic for each of a population of individuals, said first template being a reference sample of an individual's biometric characteristic and said second template being initially derived from said first template;
• and
• a repository keeper operative to compare an individual's first and second templates to a fresh sample provided by the individual and, if the fresh sample is found to sufficiently resemble the first and second templates, to modify the second template to take into account differences between the reference sample and the fresh sample.

A digital decision making system comprising:

• a portable digital information receptacle;
• and
• an information receptacle terminal operative to carry out an interaction with the portable digital information receptacle and to make a decision based on said interaction, wherein said interaction includes a clear portion and a protected portion and wherein said clear portion includes only a declaration on the part of the terminal of its identity.

A digital decision making method comprising:

• providing a portable digital information receptacle;
• and
• carrying out an interaction between the portable receptacle and an information receptacle terminal, thereby allowing the terminal to make a decision based on said interaction, wherein said interaction includes a clear portion and a protected portion and wherein said clear portion includes only a declaration on the part of the terminal of its identity.

A biometric system comprising:

• a multiplicity of smart cards storing a multiplicity of biometric templates respectively identifying a multiplicity of persons respectively;
• wherein each of the smart cards is operative to receive a biotest and to perform a decision process to determine whether the biotest should be accepted as identifying the person associated with the smart card.