Access restriction device, access restriction method, computer readable storage medium

A non-transitory computer readable storage medium having stored therein an access restriction program causing a computer to execute an access restriction process with a character string, the process comprising:

• receiving an email from a transmission source;
• analyzing information in a first file, when the first file is attached to the email, and specifying a character string from the first file;
• specifying the access restriction process associated with the character string stored in the memory;
• generating a second file from the first file by executing the specified access restriction process on the first file;
• attaching, instead of the first file attached to the email, the second file to the email;
• and
• sending the email with the second file to a transmission destination of the email.

An access restriction method executed by a computer, the method being associated with a character string, the method comprising:

• receiving, using a processor, an email from the transmission source;
• analyzing, using the processor, information in a first file when the first file is attached to the email, and specifying, using the processor, a character string from the first file;
• specifying, using the processor the access restriction process associated with the character string stored in the memory;
• generating, using the processor, a second file from the first file by executing the specified access restriction process on the first file;
• attaching, using the processor, instead of the first file attached to the email, the second file to the email;
• and
• sending, using the processor, the email with the second file to a transmission destination of the email.

An access restriction device comprising:

• a processor;
• and
• a memory that stores an access restriction process associated with a user, wherein the processor executes a process comprising:
• receiving an email from a transmission source;
• analyzing a main body of a first file when the first file is attached to the email, and specifying, from an analysis result, a user who has reading authorization for the first file;
• specifying the access restriction process associated with the user stored in the memory;
• generating a second file from the first file by executing, on the first file, the access restriction process;
• and
• attaching, instead of the first file attached to the email, the second file to the email;
• and
• sending the email with the second file to a transmission destination of the email.