Electronic attack can deceive or desensitize enemy battle commanders through insertion of spurious radar tracks or blot out entire avenues of approach.
If couples of users make a coalition and collude to generate a new image or video section, they would weaken the examinable energy of the fingerprint a lot, hence avoid being traced.
Set of stamps in the above designs and in a third design showing a woman quilling was prepared in 1920, but not issued price of set, $4, exist with “SPECIMEN” overprint and imperf counterfeits exist.