Tokenless biometric authorization of transaction between a consumer and a merchant uses an identicator and an access device. The filter material 42 has first and second major surfaces 45, 47 and is disposed in the housing such that the second major surface 47 of the filter material is located downstream to the first major surface 45. Semantic labels for words in the sequence of words are then generated and each label is assigned to the appropriate one of the words in the sequence of words. The approach may be used to increase the size and stability of Barker correlator magnitudes generated for taps far away from a determined bit synchronization time. The method also includes storing, at the authentication server, the first index and the first security key. The trench is disposed in the semiconductor layer between the light sensing element and the light emitting element.