Abstract: In some implementations, a device may obtain first location data associated with one or more exchanges, where the first location data is associated with a first level of granularity. The device may determine second location data associated with the one or more exchanges based on records associated with the one or more exchanges, where the second location data is associated with a second level of granularity that is higher than the first level of granularity. The device may detect an authentication event associated with an access attempt to the account. The device may provide, based on detecting the authentication event, one or more authentication queries that are based on the second location data. The device may authenticate the access attempt to the account based on one or more responses to the one or more authentication queries.

Abstract: A bill-receiving apparatus includes a shell, a front cover, a bill-feeding mechanism and a sensor assembly. The front cover is attached to a front side of the shell. The front cover includes a slot through which a bill can be inserted into the shell. The bill-feeding mechanism can feed the bill. The bill-feeding mechanism includes two pulley-belt modules each mounted on a side of the shell. The sensor assembly includes an upper sensor box and a lower sensor box. Each of the upper and lower sensor boxes includes a control board, a protective element and a body. At least one sensor is mounted on the control board. The protective element includes at least one bubble enclosing the at least one sensor. The body includes at least one window in which the at least one bubble is disposed.

Abstract: A bill-receiving apparatus includes a shell, a front cover, a sensor assembly, a bill-feeding mechanism and a detachable rear cover unit. The shell includes two lateral walls each including a cutout defined in a rear edge. The cutout includes a narrowed mouth. The front cover is attached to a front side of the shell. The front cover includes a slot through a bill can be inserted. The sensor assembly is arranged behind the front cover and used to detect the bill. The bill-feeding mechanism feeds the bill under the control of the sensor assembly. The detachable rear cover unit includes two flank walls and two detents elastically attached to the flank walls. Each detent includes a rod for trapping in a related one of the cutouts and a tip for moving from a related one of the cutouts through the mouth.

Abstract: A paper currency receiving apparatus includes a body with a bill-receiving opening in a front end thereof, a detecting device mounted in the body and defining a bill passage through which a bill inserted into the bill-receiving opening passes, and a bill-collecting box for receiving the bill. The genuineness of the bill is discriminated by the detecting device. In a case that a fraud operation is attempted by bonding an end of a string to a side of the bill and inserting the bill into the bill-receiving opening, the string is severed by one of a plurality of cutting edges on the detecting device.

Abstract: A paper currency receiving apparatus includes a body with a bill-receiving opening in a front end thereof, a detecting device mounted in the body and defining a bill passage through which a bill inserted into the bill-receiving opening passes, and a bill-collecting box for receiving the bill. The genuineness of the bill is discriminated by the detecting device. In a case that a fraud operation is proceeded by bonding an end of a string to a side of the bill and inserting the bill into the bill-receiving opening, the string is severed by one of a plurality of cutting edges on the detecting device.

Abstract: A paper currency receiving device includes a body and two wheel assembly modules. The body has two opposed sides each, having an opening that communicates an interior of the body with outside. The body further has a bill-receiving opening in a front side thereof. The wheel assembly modules are respectively, detachably mounted to the openings of the body. Each wheel assembly module includes a plate and a wheel assembly mounted on an inner side of the plate. The wheel assembly includes a plurality of wheels and a belt mounted around the belt. The wheel assemblies feed a bill inserted into the bill-receiving opening into the interior of the body.