Perhaps you should try some spelling variations:

• authentication algorithms »
  • estimation algorithms (Expand Search)
• quantification algorithms »
  • identification algorithms (Expand Search)
  • classification algorithms (Expand Search)
  • optimization algorithms (Expand Search)
• automated quantification »
  • automatic identification (Expand Search)
  • automation justification (Expand Search)
  • automated centrifugation (Expand Search)
• image authentication »
  • based authentication (Expand Search)
  • meat authentication (Expand Search)
  • wine authentication (Expand Search)