Moreover, the signal-processing operations performed by processors 421-422 can include: filtering operations; conversions among the time, space and frequency domains; Fourier transforms; Butterworth filters, Z-plane analysis operations, wavelet transforms, or other operations to extract information from signals. Also, note that feature vectors 423-424 can include timestamps associated with specific sensor data collected on a per-sensor basis. Processors 421-422 can also extract encryption key bits from biometric/behavioral factors, and can combine them with other bits to form encryption keys that can be used to decrypt sensitive data. Next, processors 421-422 buffer feature vectors 423-424 and send them to database service 431, which aggregates and stores feature vectors obtained from multiple processors.

Analysis component 441 then queries database service 431 to obtain feature vectors 423-424, and performs various analysis and machine-learning operations to correlate the data and generate one or more security scores and associated identifiers 443.