Information processing system receiving and sending file with timestamp including hash value
AssigneeHeartbeats Corporation
InventorMasanori Fujisaki
Life of this patent
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Abstract
An information processing system is provided. This information processing system includes: a controller; and a memory. The controller accepts a transmission request for transmitting a file stored in the memory. The controller acquires a first timestamp based on the file when accepting the transmission request. The first timestamp includes a first hash value which is a random letter string acquired from the file. The controller allows the memory to store the first timestamp to be linked with the file, and transmits the file to a destination that has sent the transmission request.
Claims18
An information processing system comprising:
- a memory;
- and
- a controller, the controller being configured to:
- receive mail information and a file from a transmission client, the mail information relating to a mail, the file being attached to the mail;
- cause the memory to store the mail information and the file;
- acquire a second timestamp based on the file when the file is stored into the memory, the second timestamp including a second hash value which is acquired from the file;
- cause the memory to store the second timestamp in association with the file;
- send the mail information stored in the memory to a reception client;
- accept a sending request for sending the file stored in the memory from the reception client;
- acquire a first timestamp based on the file when the sending request is accepted, the first timestamp including a first hash value which is acquired from the file;
- cause the memory to store the first timestamp in association with the file;
- compare between the first hash value and the second hash value to determine whether the first hash value matches the second hash value;
- and
- send the file to the reception client when the controller determines that the first hash value matches the second hash value.
An information processing method for causing a controller to execute a process, the information processing method comprising executing on the controller the steps of:
- receiving mail information and a file from a transmission client, the mail information relating to a mail, the file being attached to the mail;
- causing a memory to store the mail information and the file;
- acquiring a second timestamp based on the file when the file is stored into the memory, the second timestamp including a second hash value which is acquired from the file;
- causing the memory to store the second timestamp in association with the file;
- sending the mail information stored in the memory to a reception client;
- accepting a sending request for sending the file stored in the memory from the reception client;
- acquiring a first timestamp based on the file when the sending request is accepted, the first timestamp including a first hash value which is acquired from the file;
- causing the memory to store the first timestamp in association with the file;
- comparing between the first hash value and the second hash value to determine whether the first hash value matches the second hash value;
- and
- sending the file to the reception client when the controller determines that the first hash value matches the second hash value.
An information processing system configured to receive and send a file between a transmission client and a reception client, the information processing system comprising:
- a memory;
- and
- a controller, the controller being configured to:
- acquire a second timestamp based on the file, which is received from the transmission client, when the file is stored into the memory, the second timestamp including a second hash value which is acquired from the file;
- cause the memory to store the second timestamp in association with the file;
- accept a sending request for sending the file stored in the memory from the reception client;
- acquire a first timestamp based on the file when the sending request is accepted, the first timestamp including a first hash value which is acquired from the file;
- cause the memory to store the first timestamp in association with the file;
- cause a display to display a time at which the second timestamp is acquired and a time at which the first timestamp is acquired;
- and
- send the file to the reception client.
Dependencies are inferred from the claim text.