Abstract: An information processing device structured to process information of an information recording medium having been inserted inside may include a communication part which receives a radio wave of a specific frequency band, and a foreign matter detection part structured to detect that a foreign matter has been attached in response to an intensity of the radio wave received by the communication part being greater than or equal to a threshold value for a predetermined time.

Abstract: An information processing device structured to process information of an information recording medium having been inserted inside may include a communication part which receives a radio wave of a specific frequency band, and a foreign matter detection part structured to detect that a foreign matter has been attached in response to an intensity of the radio wave received by the communication part being greater than or equal to a threshold value for a predetermined time.

Abstract: The present invention improves the environment resistance performance of a magnetic card reader, and also improves the operation stability of a system including a higher-level device. Specifically to describe, the magnetic card reader 1, for reading magnetic data recorded in a card 4 by using a magnetic head 5, includes: a storage section (a part of a RAM 104) for storing the magnetic data read and acquired by using the magnetic head 5; a first comparing section for comparing the total number of data in the magnetic data with a prescribed first threshold; and a first judgment section for judging that the magnetic data is effective data when the total number of data in the magnetic data is less than or equal to the prescribed first threshold in the first comparing section.

Abstract: The present invention improves the environment resistance performance of a magnetic card reader, and also improves the operation stability of a system including a higher-level device. Specifically to describe, the magnetic card reader 1, for reading magnetic data recorded in a card 4 by using a magnetic head 5, includes: a storage section (a part of a RAM 104) for storing the magnetic data read and acquired by using the magnetic head 5; a first comparing section for comparing the total number of data in the magnetic data with a prescribed first threshold; and a first judgment section for judging that the magnetic data is effective data when the total number of data in the magnetic data is less than or equal to the prescribed first threshold in the first comparing section.