JP5530908B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus that forms an image on an image forming medium such as paper.

In the image forming apparatus, user data stored in an external storage unit such as a USB (Universal Serial Bus) memory is copied to an internal memory (storage unit) in the image forming apparatus, and the user data is used in the image forming apparatus. There is something you can do.
In such an image forming apparatus, in order to prevent user data stored in the storage unit from being overwritten by user data copied from the external storage unit, the user data stored in the storage unit is saved in a save memory. After that, there is one that copies user data from the external storage unit to the storage unit (see Patent Document 1).

JP 2005-150875 A

  In the invention described in Patent Document 1, any user can copy user data stored in the external storage unit to the storage unit by attaching the external storage unit to the image forming apparatus. However, in the invention described in Patent Document 1, any user can copy user data even if the user data is data including personal information. Therefore, there is a possibility that information such as personal information may be leaked. is there.

  An object of the present invention is to provide an image forming apparatus that reduces the possibility of information leakage via an external storage unit.

  The present invention performs login processing based on authenticating user identification information, and allows a login / logout processing unit for executing logout processing, a storage unit for storing user data, and an external storage unit to be removable. When login processing is performed by the interface unit to be mounted and the login / logout processing unit, it is possible to write user data to the storage unit and to read user data stored in the storage unit When the login process is performed by the writing / reading unit and the login / logout processing unit, user data is written to the external storage unit via the interface unit, and the external storage unit is connected to the external storage unit via the interface unit. An external storage unit control unit capable of reading stored user data About the image forming apparatus.

  In addition, when the external storage unit control unit stores user data read from the storage unit by the writing / reading unit in the external storage unit via the interface unit, according to a predetermined condition, The identification information authenticated by the login / logout processing unit is stored in the external storage unit, or the identification information authenticated by the login / logout processing unit is added to the user data read from the storage unit. The user data is preferably stored in the storage unit.

  The image forming apparatus also includes a first determination unit that determines whether the identification information authenticated by the login / logout processing unit matches the identification information included in the external storage unit attached to the interface unit. And each of the writing / reading unit and the external storage unit control unit writes user data and reads user data when the first determination unit determines that the respective identification information matches. It is preferable to be able to perform.

  In addition, the image forming apparatus includes identification information included in security information in which user data types that can be written and read by the writing / reading unit and the external storage unit control unit are set for each user identification information. A second determination unit that determines whether there is a match with the identification information authenticated by the login / logout processing unit, and user data stored in the external storage unit by the external storage unit control unit In order to read out the user data stored in the storage unit by the writing / reading unit, and a first selection unit for selecting any one of a plurality of user data stored in the external storage unit A second selection unit for selecting one of a plurality of user data stored in the storage unit, and identification information included in the security information When the second determination unit determines that there is a match with the identification information authenticated by the login / logout processing unit, the type of user data corresponding to the matching identification information is read from the storage unit, It is preferable to include a restriction unit that restricts processing of the first selection unit and the second selection unit so as to select only user data that matches the type of the read user data.

  The storage unit has a temporary storage area for temporarily storing user data written by the writing / reading unit, and the writing / reading unit is subjected to logout processing by the login / logout processing unit. The user data stored in the temporary storage area is preferably deleted.

  The present invention can provide an image forming apparatus that reduces the possibility of information leakage via an external storage unit.

1 is a diagram illustrating an overall configuration of a copier according to an embodiment of an image forming apparatus. 2 is a block diagram illustrating a functional configuration of a copier. FIG. 6 is a flowchart for explaining the copy notification operation of the copier.

  A copier according to an embodiment of an image forming apparatus of the present invention will be described below with reference to the drawings. First, the overall configuration of the copy machine 1 will be described. FIG. 1 is a diagram for explaining an overall configuration of a copier 1 according to an embodiment of an image forming apparatus.

The copier 1 includes a document transport unit 10, a document reading unit 20, a paper transport unit 30, an image forming unit 40, a transfer unit 50, and a fixing unit 60.
The document transport unit 10 is an ADF (Auto Document Feeder), and includes a document placement unit 11, a first feed roller 12, a guide 13, a timing roller pair 14, and a document discharge unit 15. The first feed roller 12 supplies the document G placed on the document placement unit 11 to the timing roller pair 14 one by one in order. The timing roller pair 14 is a timing at which the original reading unit 20 reads an image of the original G and a timing at which the original G is supplied to a position where the image of the original G is read by the original reading unit 20 (position where the guide 13 is disposed). In order to match, the conveyance of the original G or the conveyance stop of the original G is performed. The guide 13 guides the conveyed document G to a first reading surface 21a described later. The document discharge unit 15 discharges the document G whose image has been read by the document reading unit 20 (passed through the guide 13) to the outside of the copier body 2.
A document stacking unit 16 is formed outside the copying machine main body 2 in the document discharge unit 15. In the document stacking unit 16, the documents G discharged from the document discharge unit 15 are stacked and stacked.

  The document reading unit 20 includes a first reading surface 21a and a second reading surface 22a. The first reading surface 21 a is formed along the upper surface of the first contact glass 21 disposed to face the guide 13 and serves as a surface for reading an image of the document G. The second reading surface 22a is disposed adjacent to the first reading surface 21a (in the case shown in FIG. 1, over the most right side of the first reading surface 21a). The second reading surface 22 a is used when reading an image of the document G without using the document transport unit 10. The second reading surface 22a is formed along the upper surface of the second contact glass 22 on which the document G is placed, and serves as a surface for reading an image of the document G.

  The document reading unit 20 includes an illumination unit 23, a first mirror 24, a second mirror 25, a third mirror 26, an imaging lens 27, and an imaging unit 28 inside the copier body 2. . The illumination unit 23 and the first mirror 24 move in the sub-scanning direction X, respectively. The second mirror 25 and the third mirror 26 are disposed on the left side of the illumination unit 23 and the first mirror 24 in FIG. Further, the second mirror 25 and the third mirror 26 are the first reading surface 21 a or the second reading surface 22 a through the first mirror 24, the second mirror 25, the third mirror 26, and the imaging lens 27. To the imaging unit 28 while moving in the sub-scanning direction X while keeping the distance (optical path length) constant.

  The illumination unit 23 is a light source that irradiates the original G with light. The first mirror 24, the second mirror 25, and the third mirror 26 are mirrors for guiding the light reflected by the document G to the imaging lens 27 while keeping the optical path length constant. The imaging lens 27 focuses the light incident from the third mirror 26 on the imaging unit 28. The imaging unit 28 is an imaging device for obtaining image data based on an imaged optical image by converting incident light into an electrical signal. For example, the imaging unit 28 is a CCD (Charge Coupled Device) or a CMOS (Complementary). It is an image sensor such as Metal Oxide Semiconductor).

The paper transport unit 30 includes a second feed roller 31, a third feed roller 32, a registration roller pair 33, and a paper discharge unit 34. The second feed roller 31 supplies the paper T (image forming medium) stored in the paper feed cassette 36 to the transfer unit 50. The third feed roller 32 supplies the paper T (image forming medium) placed on the manual feed tray 37 to the transfer unit 50. The registration roller pair 33 carries the paper T or stops the conveyance of the paper T in order to match the timing at which the toner image is formed on the transfer unit 50 and the timing at which the paper T is supplied to the transfer unit 50. Further, the registration roller pair 33 performs skew (oblique feeding) correction of the paper T. The paper discharge unit 34 discharges the paper T on which the toner image is fixed to the outside of the copier body 2.
A paper discharge stacking unit 35 is formed outside the copier body 2 in the paper discharge unit 34. In the paper discharge stacking unit 35, the paper T discharged from the paper discharge unit 34 is stacked and stacked.

The image forming unit 40 includes a photosensitive drum 41, a charging unit 42, a laser scanner unit 43, a developing device 44, a cleaning unit 45, a toner cartridge 46, a primary transfer roller 47, and an intermediate transfer belt 48. And an opposing roller 49.
The photoconductor drum 41 (41a, 41b, 41c, 41d) functions as a photoconductor or an image carrier in order to form toner images of black, cyan, magenta, and yellow, respectively. Around each photosensitive drum 41a, 41b, 41c, 41d, in order from the upstream side to the downstream side along the rotational direction of the photosensitive drum 41, a charging unit 42, a laser scanner unit 43, a developing device 44, A cleaning unit 45 is disposed. The charging unit 42 charges the surface of the photosensitive drum 41. The laser scanner unit 43 is arranged away from the surface of the photosensitive drum 41 and scans and exposes the surface of the photosensitive drum 41 based on image data relating to the original G read by the original reading unit 20. As a result, the exposed portion of the charge is removed from the surface of the photosensitive drum 41 to form an electrostatic latent image. The developing device 44 forms a toner image by attaching toner to the electrostatic latent image formed on the surface of the photosensitive drum 41. The cleaning unit 45 removes toner and the like remaining on the surface of the photosensitive drum 41 after the surface of the photosensitive drum 41 is neutralized by a static eliminator (not shown).
The toner cartridge 46 stores toner of each color supplied to the developing device 44. The toner cartridge 46 and the developing device 44 are connected by a toner supply path (not shown).

  The primary transfer rollers 47 (47a, 47b, 47c, 47d) are arranged on the opposite sides of the intermediate transfer belt 48 from the photosensitive drums 41a, 41b, 41c, 41d, respectively. The intermediate transfer belt 48 is a belt that passes through the image forming unit 40 and the transfer unit 50. A part of the intermediate transfer belt 48 is sandwiched between the photosensitive drums 41a, 41b, 41c, and 41d and the primary transfer rollers 47a, 47b, 47c, and 47d, and the photosensitive drums 41a, 41b, 41c, and 41d. The toner image formed on the surface is primarily transferred. The counter roller 49 is a drive roller that is disposed inside the annular intermediate transfer belt 48 and advances the intermediate transfer belt 48 in the direction of arrow A shown in FIG.

  The transfer unit 50 includes a secondary transfer roller 51. The secondary transfer roller 51 is disposed on the opposite side of the intermediate transfer belt 48 from the counter roller 49, and a part of the intermediate transfer belt 48 is sandwiched between the counter roller 49. Further, the secondary transfer roller 51 secondarily transfers the toner image primarily transferred to the intermediate transfer belt 48 onto the paper T.

  The fixing unit 60 includes a heating rotator 61 and a pressure rotator 62. The heating rotator 61 and the pressure rotator 62 sandwich the paper T on which the toner image is secondarily transferred, melt and pressurize the toner, and fix the toner to the paper T.

Next, the functional configuration of the copy machine 1 will be described. FIG. 2 is a block diagram showing a functional configuration of the copy machine 1.
The copier 1 includes the above-described components (the document transport unit 10, the document reading unit 20, the paper transport unit 30, the image forming unit 40, the transfer unit 50, and the fixing unit 60). The engine unit 3 is configured by the paper transport unit 30, the image forming unit 40, the transfer unit 50, and the fixing unit 60. Note that the description of the components described with reference to FIG. 1 is omitted.
Furthermore, the copier 1 includes an operation unit 70, a storage unit 80, a control unit 90, and an interface unit 100 in addition to the functional configuration described above.

  The operation unit 70 includes a numeric keypad (not shown), a touch panel (not shown), a start key (not shown), and the like. The numeric keypad is operated to input numbers such as the number of copies to be printed. The touch panel displays a plurality of keys to which various functions (for example, a function for setting a print magnification and a function for allocating a plurality of pages to one sheet of paper T (such as 2 in 1)) are assigned. A key displayed on the touch panel is operated to cause the copier 1 to execute any of various functions. The start key is operated to execute printing. When any key is operated, the operation unit 70 supplies a signal indicating that this key has been operated to the control unit 90.

The storage unit 80 includes a hard disk or a semiconductor memory. The storage unit 80 stores image data based on the document G read by the document reading unit 20. Further, the storage unit 80 stores a control program used in the copier 1, data used by the control program, and the like.
The storage unit 80 stores user data. User data is data in which personal information is recorded, for example. More specifically, the user data is, for example, address book data.
Furthermore, the storage unit 80 can have a temporary storage area 81 for temporarily storing user data written by a writing / reading unit 92 described later.

  An external storage unit 200 is detachably attached to the interface unit 100. The interface unit 100 is, for example, a USB port. The external storage unit 200 is a portable memory, such as a USB memory.

The control unit 90 controls the document conveying unit 10, the document reading unit 20, the engine unit 3, the operation unit 70, and the like.
In addition, the control unit 90 includes a login / logout processing unit 91, a writing / reading unit 92, an external storage unit control unit 93, a first determination unit 94, a first selection unit 95, and a second determination unit 96. , A second selection unit 97 and a limiting unit 98.

  The login / logout processing unit 91 executes a login process based on authenticating the user identification information and also executes a logout process. The login / logout processing unit 91 executes a login process to the copying machine 1 when the identification information input to the copying machine 1 matches the identification information stored in advance in the storage unit 80. Further, the login / logout processing unit 91 executes a logout process from the copier 1 based on a user operation. The identification information input to the copier 1 is input by reading the identification information stored in the IC card by an IC (Integrated Circuit) card reader, for example.

  The writing / reading unit 92 writes user data in the temporary storage area 81 of the storage unit 80 and reads the user data stored in the storage unit 80 when login processing is performed by the login / logout processing unit 91. (Or user data stored in the temporary storage area 81 or user data read from the storage unit 80 to the temporary storage area 81). That is, the writing / reading unit 92 can write and read user data during user login after the login process is performed until the logout process is performed.

  Further, the writing / reading unit 92 deletes the user data stored in the temporary storage area 81 of the storage unit 80 when the logout process is executed by the login / logout processing unit 91. In this case, when the logout process is performed, the control unit 90 deletes the user data stored in the temporary storage area 81 or deletes the user data stored in the temporary storage area 81 and saves it in the storage unit 80. It is possible to display on the touch panel of the operation unit 70 a notification for allowing the user to select whether to perform the operation. When the user selects to delete the user data, the writing / reading unit 92 deletes the user data stored in the temporary storage area 81. On the other hand, when the user selects to save the user data in the storage unit 80, the writing / reading unit 92 stores the user data stored in the temporary storage area 81 in the storage unit 80.

  When the login / logout processing unit 91 performs login processing, the external storage unit control unit 93 writes user data to the external storage unit 200 via the interface unit 100 and external storage via the interface unit 100. The user data stored in the unit 200 can be read out. That is, the external storage unit control unit 93 can write and read user data during user login after the login process is performed until the logout process is performed.

In addition, the external storage unit control unit 93 is configured to store user data read from the storage unit 80 by the writing / reading unit 92 in the external storage unit 200 via the interface unit 100 according to a predetermined condition. The identification information authenticated by the login / logout processing unit 91 is stored in the external storage unit 200. Alternatively, the external storage unit control unit 93 adds the identification information authenticated by the login / logout processing unit 91 to the user data read from the storage unit 80 according to a predetermined condition, and the user data is externally transmitted. The data is stored in the storage unit 200.
When adding the identification information to the user data, the external storage control unit 93 adds the identification information to the header portion of the user data.
The predetermined condition is, for example, a selection result obtained by allowing the user to select whether the identification information is stored in the external storage unit 200 or the identification information is added to the user data and stored in the external storage unit. Good.

  The first determination unit 94 determines whether the identification information authenticated by the login / logout processing unit 91 matches the identification information included in the external storage unit 200 attached to the interface unit 100. That is, when the identification information is stored in the external storage unit 200 or when the user data to which the identification information is added is stored in the external storage unit 200, the first determination unit 94 is a login / logout processing unit. It is determined whether the identification information authenticated by 91 matches the identification information stored in the external storage unit 200 or the identification information added to the user data stored in the external storage unit 200.

  Here, when the first determination unit 94 determines that the pieces of identification information match, the writing / reading unit 92 and the external storage unit control unit 93 write user data and read user data, respectively. It becomes possible to do. That is, when the first determination unit 94 determines that the pieces of identification information match, the external storage unit control unit 93 uses the user data read from the storage unit 80 by the writing / reading unit 92 as the interface. It can be stored in the external storage unit 200 via the unit 100. Further, the writing / reading unit 92 reads out from the external storage unit 200 via the interface unit 100 by the external storage unit control unit 93 when the first determination unit 94 determines that the pieces of identification information match. The stored user data can be stored in the storage unit 80.

  The first selection unit 95 selects one of a plurality of user data stored in the external storage unit 200 in order to read out user data stored in the external storage unit 200 by the external storage unit control unit 93. That is, the first selection unit 95 selects one or more user data from among a plurality of user data stored in the external storage unit 200 based on a user operation.

  The second determination unit 96 determines whether or not the identification information included in the security information matches the identification information authenticated by the login / logout processing unit 91. In the security information, the type of user data that can be written and read by the writing / reading unit 92 and the external storage unit control unit 93 is set for each user identification information.

  As for user data, writing to the storage unit 80 or the external storage unit 200 and reading from the storage unit 80 or the external storage unit 200 are restricted according to the user. For example, the user A can write and read only type A user data. User B can write and read only user data of type A and type B.

  Such security information in which the user (user identification information) and the type of user data that can be written and read are associated with each other is stored in the storage unit 80. For example, when the login / logout processing unit 91 authenticates the user identification information, the second determination unit 96 includes one or more pieces of identification information included in the security information stored in the storage unit 80. Then, it is determined whether or not there is a match with the identification information authenticated by the login / logout processing unit 91.

  The second selection unit 97 selects one of a plurality of user data stored in the storage unit 80 in order to read the user data stored in the storage unit 80 by the writing / reading unit 92. That is, the second selection unit 97 selects one or more user data from among a plurality of user data stored in the storage unit 80.

  When the second determination unit 96 determines that the identification information included in the security information matches the identification information authenticated by the login / logout processing unit 91, the restriction unit 98 matches the identification information. The type of user data corresponding to is read from the storage unit 80. Furthermore, the restriction unit 98 restricts the processing of the first selection unit 95 and the second selection unit 97 so as to select only user data that matches the type of the read user data.

  In other words, if there is identification information that matches the identification information authenticated by the login / logout processing unit 91 in the security information, the restriction unit 98 refers to the security information to change the matching identification information. The type of the corresponding user data is read from the storage unit 80. Furthermore, the restriction unit 98 restricts (sets) each of the first selection unit 95 and the second selection unit 97 so as to select only user data that matches the read type. For example, in the case of the above example, when the user A is logged in to the copier 1, the restriction unit 98 selects the first selection unit 95 and the second selection unit so as to select only the type A user data. 97 processing is limited. In the case of the above example, when the user B is logged in to the copier 1, the restriction unit 98 selects the first selection unit 95 and the first selection unit so as to select only the user data of type A and type B. The processing of the 2 selection unit 97 is limited.

  Next, the operation of the copy machine 1 in this embodiment will be described. FIG. 3 is a flowchart for explaining the copy notification operation of the copying machine 1.

  In step ST11, the login / logout processing unit 91 executes a login process based on authenticating user identification information.

  In step ST12, each of the writing / reading unit 92 and the external storage unit control unit 93 executes validation so that user data can be written and read.

  In step ST13, the first selection unit 95 and the second selection unit 97 determine whether the process performed based on the user instruction is user data import or user data export. In the case of export, the process proceeds to step ST14. In the case of import, the process proceeds to step ST16.

  In step ST14, the first selection unit 95 selects user data to be exported from user data stored in the storage unit 80.

  In step ST15, the control unit 90 executes export. That is, the writing / reading unit 92 reads the user data selected by the first selection unit 95 from the storage unit 80. Furthermore, the external storage unit control unit 93 writes the user data read by the writing / reading unit 92 to the external storage unit 200 via the interface unit 100. In this case, the external storage unit control unit 93 writes the identification information of the user authenticated at the time of the login process in step ST11 into the external storage unit 200, or adds the identification information to the user data and stores the user data in the external storage. Part 200 is written. After step ST15, the process proceeds to step ST19.

  In step ST <b> 16, the second selection unit 97 determines whether the user data of the login user exists in the external storage unit 200. That is, the second selection unit 97 reads the type of user data corresponding to the identification information of the user (logged-in user) authenticated by the login / logout processing unit 91 from the storage unit 80 by the restriction unit 98, The restriction unit 98 restricts only user data corresponding to. The second selection unit 97 determines whether there is user data (user data corresponding to the type) that can be selected by being restricted by the restriction unit 98. If user data does not exist (No), the process proceeds to step ST19. If user data exists (Yes), the process proceeds to step ST17.

  In step ST <b> 17, the second selection unit 97 selects user data to be imported from user data stored in the external storage unit 200. In addition, the 2nd selection part 97 selects only the classification of the user data corresponding to the identification information authenticated when the login process of step ST11 is performed, when it has restrict | limited by the restriction | limiting part 98. FIG.

  In step ST18, the control unit 90 executes import. That is, the external storage unit control unit 93 reads the user data selected by the second selection unit 97 from the external storage unit 200 via the interface unit 100. Further, the writing / reading unit 92 writes the user data read by the external storage unit control unit 93 to the storage unit 80.

In step ST19, the control unit 90 determines whether all user data desired by the user has been imported or exported. If all user data has not been imported or exported (No), the process returns to step ST13. If all user data has been imported or exported (Yes), the process ends.
When the user causes the copier 1 to execute logout processing after the above-described processing ends, the login / logout processing unit 91 executes logout processing.

As described above, according to the copying machine 1 of the present embodiment, the following effects are produced.
That is, in the copying machine 1 according to the present embodiment, when the login process is performed by the login / logout processing unit 91, the user data is written into the storage unit 80 and stored in the storage unit 80 by the writing / reading unit 92. User data can be read out, and user data is written to the external storage unit 200 via the interface unit 100 and read out from the external storage unit 200 via the interface unit 100 by the external storage unit control unit 93. It becomes possible. Accordingly, the copy machine 1 stores user data from the storage unit 80 to the external storage unit 200 or from the external storage unit 200 based on an operation of only a user having identification information that can log into the copy machine 1. Therefore, the possibility of information leakage through the external storage unit 200 can be reduced.

  The copy machine 1 is authenticated by the login / logout processing unit 91 when the user data read from the storage unit 80 by the writing / reading unit 92 is stored in the external storage unit 200 via the interface unit 100. The identification information is stored by the external storage control unit 93. Thereby, the copy machine 1 can authenticate the identification information when copying the user data stored in the external storage unit 200 to the storage unit 80.

  Further, when the first determination unit 94 determines that the respective pieces of identification information match, the copy machine 1 allows the write / read unit 92 and the external storage unit control unit 93 to write user data and Data can be read out. Thereby, the copier 1 can reduce the possibility of information leakage through the external storage unit 200.

  The copy machine 1 matches the identification information included in the security information when the second determination unit 96 determines that there is a match with the identification information authenticated by the login / logout processing unit 91. The first selection unit 95 and the second selection unit are read by the restriction unit 98 so that the type of user data corresponding to the identification information is read from the storage unit 80 and only user data that matches the type of the read user data is selected. 97 processing is limited. As a result, the copy machine 1 restricts user data that can move the storage unit 80 and the external storage unit 200 to each other in accordance with the user, so that information leakage through the external storage unit 200 is prevented. The possibility can be reduced.

  In the copying machine 1, when the logout process is executed by the login / logout processing unit 91, the writing / reading unit 92 deletes the user data stored in the temporary storage area 81. Thereby, the copying machine 1 can prevent the user data stored in the temporary storage area 81 from being read by another user by deleting the user data stored in the temporary storage area 81. Therefore, the copy machine 1 can reduce the possibility of information leakage through the external storage unit 200.

In addition, this invention is not limited to embodiment mentioned above, It can implement with a various form.
The copier 1 of the present embodiment is a color copier, but is not limited to this form and may be a monochrome copier.
In the copying machine 1 of the present embodiment, the toner image is transferred to the paper T via the intermediate transfer belt 48 (indirect transfer method). However, the present invention is not limited to this form, and is formed on the photosensitive drum. The transferred toner image may be directly transferred to the paper T (direct transfer method).
The copier 1 of the present embodiment is configured to print one side of the paper T, but is not limited to this, and may be configured to print both sides of the paper.

Further, the image forming apparatus of the present invention is not limited to the copying machine 1 described above. In other words, the image forming apparatus of the present invention may be a multi-function machine having a copy function, a facsimile function, a printer function, and a scanner function, or may be a facsimile or a printer.
The image forming medium on which the toner image is fixed by the image forming apparatus of the present invention is not limited to the paper T, and may be a film sheet such as an OHP (overhead projector) sheet.

DESCRIPTION OF SYMBOLS 1 ... Copy machine (image forming apparatus), 80 ... Memory | storage part, 81 ... Temporary memory area, 91 ... Login / logout process part, 92 ... Write-out read-out part, 93 ... External memory | storage part control part, 94 ... 1st judgment part 95 ... first selection unit, 96 ... second determination unit, 97 ... second selection unit, 98 ... restriction unit, 100 ... interface unit, 200 ... external storage unit

Claims (4)

A login / logout processing unit that executes logout processing based on authenticating user identification information, and executes logout processing;
A storage unit for storing user data;
An interface unit to which the external storage unit is detachably mounted;
A writing / reading unit capable of writing user data to the storage unit and reading user data stored in the storage unit when login processing is performed by the login / logout processing unit;
When login processing is performed by the login / logout processing unit, user data is written to the external storage unit via the interface unit, and user data stored in the external storage unit is read via the interface unit. That is possible ,
When the user data read from the storage unit by the writing / reading unit is stored in the external storage unit via the interface unit, it is authenticated by the login / logout processing unit according to a predetermined condition. The identification information stored in the external storage unit or the identification information authenticated by the login / logout processing unit is added to the user data read from the storage unit, and the user data is stored in the external storage unit. An external storage control unit to be stored in
A first determination unit that determines whether the identification information authenticated by the login / logout processing unit and the identification information included in the external storage unit attached to the interface unit match ,
The external storage unit control unit reads out user data corresponding to the identification information from the external storage unit when the first determination unit determines that the respective pieces of identification information match.
Image forming apparatus. When the first determination unit determines that the respective pieces of identification information match, the writing / reading unit and the external storage unit control unit respectively write user data and read user data. The image forming apparatus according to claim 1 , wherein: The login / logout is included in the identification information included in the security information in which the type of user data that can be written and read by the writing / reading unit and the external storage unit control unit is set for each user identification information. A second determination unit that determines whether there is a match with the identification information authenticated by the processing unit;
A first selection unit that selects one of a plurality of user data stored in the external storage unit in order to read out user data stored in the external storage unit by the external storage unit control unit;
A second selection unit that selects one of a plurality of user data stored in the storage unit in order to read out user data stored in the storage unit by the writing / reading unit;
User data corresponding to the matching identification information when the second determination unit determines that the identification information included in the security information matches the identification information authenticated by the login / logout processing unit. A limiting unit that limits the processing of the first selection unit and the second selection unit so as to select only user data that matches the type of the read user data,
The image forming apparatus according to claim 1 or 2 comprising a. The storage unit has a temporary storage area for temporarily storing user data written by the writing / reading unit,
The image according to any one of claims 1 to 3 , wherein the writing / reading unit deletes user data stored in the temporary storage area when logout processing is executed by the login / logout processing unit. Forming equipment.

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