Privacy preservation enhancing device for processing data derivable from remotely detected electromagnetic radiation emitted or reflected by a subject, the data comprising physiological information, said device comprising: - a signal detector unit configured for receiving an input signal and for transmitting a signal comprising indicative entities thereof, the indicative entities being indicative of physiological information representative of at least one vital parameter (17; 150) in a subject of interest, wherein the input signal comprises an input sequence (44; 102) of signal samples (104a, 104b, 104c); wherein the signal detector unit is further configured for detecting the indicative entities under consideration of at least one defined descriptive model describing a relation between physical skin appearance characteristics and a corresponding representation in the input signal such that non-indicative side information, not indicative of said at least one vital parameter but containing privacy-related information, that is represented by non-indicative entities in the input signal is substantially undetectable in a resulting transmitted signal, wherein the at least one descriptive model is a descriptive skin color model; and - a processing unit configured for extracting the at least one vital parameter (17; 150) from the transmitted signal comprising the indicative entities, wherein the at least one vital parameter (17; 150) is extracted under consideration of detected skin color properties representing circulatory activity; characterized by - a feature detector configured for detecting identity-related prominent features (84a, 84b) in the signal samples (104a, 104b, 104c) of the input sequence (44; 102); and - a feature masking unit configured for masking respective detected entities in the transmitted signal. - a signal detector unit configured for receiving an input signal and for transmitting a signal comprising indicative entities thereof, the indicative entities being indicative of physiological information representative of at least one vital parameter (17; 150) in a subject of interest, wherein the input signal comprises an input sequence (44; 102) of signal samples (104a, 104b, 104c); wherein the signal detector unit is further configured for detecting the indicative entities under consideration of at least one defined descriptive model describing a relation between physical skin appearance characteristics and a corresponding representation in the input signal such that non-indicative side information, not indicative of said at least one vital parameter but containing privacy-related information, that is represented by non-indicative entities in the input signal is substantially undetectable in a resulting transmitted signal, wherein the at least one descriptive model is a descriptive skin color model; and - a processing unit configured for extracting the at least one vital parameter (17; 150) from the transmitted signal comprising the indicative entities, wherein the at least one vital parameter (17; 150) is extracted under consideration of detected skin color properties representing circulatory activity; characterized by - a feature detector configured for detecting identity-related prominent features (84a, 84b) in the signal samples (104a, 104b, 104c) of the input sequence (44; 102); and - a feature masking unit configured for masking respective detected entities in the transmitted signal.