Patent ID: 6973168

Claim:
A method of identifying a caller with a telephone service operator, comprising the steps of: for the operator, deriving at least one list of literal expressions and generating a database of callers authorized to use the telephone service, said database associating each of said authorized callers with a unique identifier consisting of a combination of consecutive literal expressions, each literal expression of the combination being respectively obtained from said at least one list of literal expressions; for the caller, connecting to said telephone service and speaking, in order, each literal expression of said unique identifier associated therewith and of which said caller has prior knowledge; for the operator, recognizing whether the literal expressions spoken by the caller belong to said at least one list of literal expressions and, if so, searching the database to compare the spoken combination of consecutive literal expressions to identifiers stored in the database; and identifying the caller if the combination of literal expressions spoken by the caller and recognized by the operator matches an identifier in the database.