| CPC H04L 63/0407 (2013.01) [G06F 21/602 (2013.01); G06F 21/6245 (2013.01); G06F 21/6254 (2013.01); G06Q 30/0201 (2013.01); G06V 20/52 (2022.01); G08B 13/19613 (2013.01); G08B 13/19667 (2013.01); H04L 63/0428 (2013.01); H04N 5/913 (2013.01); H04N 7/183 (2013.01); G06T 7/246 (2017.01); G06T 2207/30196 (2013.01); G06T 2207/30232 (2013.01); G06T 2207/30241 (2013.01); G06V 40/173 (2022.01); G06V 40/178 (2022.01); H04N 2005/91364 (2013.01)] | 9 Claims |

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1. An information output device comprising:
a card reader configured to read an encryption key from a key card;
at least one memory storing instructions; and
at least one processor configured to execute the instructions to:
read the encryption key from the key card, using the card reader;
acquire an image from a camera;
determine whether a person other than a store clerk appears in the acquired image and whether or not a current time is within the business hours of a store;
extract attribute information of the person other than the store clerk from the acquired image;
perform, by using the encryption key, scrambling processing with respect to the person included in the acquired image;
based on the determination of whether or not the person other than the store clerk appears in the acquired image and whether or not the current time is within the business hours of the store, do not output the scrambled image and the attribute information in a case where the current time is not within the business hours;
based on the determination of whether or not the person other than the store clerk appears in the acquired image and whether or not the current time is within the business hours of the store, do not output the scrambled image and attribute information in a case where the current time is within the business hours and the person other than the store clerk is not included in the acquired image;
based on the determination of whether or not the person other than the store clerk appears in the acquired image and whether or not the current time is within the business hours of the store, output the scrambled image and the attribute information in a case where the current time is within the business hours and the person other than the store clerk is included in the acquired image;
perform, by using a decryption key corresponding to the encryption key, descrambling processing with respect to the scrambled image;
determine whether or not the person included in the descrambled image is registered in a list by comparing the person included in the descrambled image with the list, the list including a plurality of images of people; and
output a determination result of whether or not the person is registered in the list.
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