Information processing apparatus and computer readable medium

1. A system comprising:

a processor;

a memory; and

an image forming device,

the processor configured to carry out instructions comprising:

accepting document information and target information which is an object of encryption;

accepting specification of information representing a formation position on a medium at which an information image based on the target information is formed;

acquiring an encryption key based on the specified information;

encrypting the target information using the acquired encryption key, and generating the information image based on the encrypted target information; and

outputting a command to the image forming device for forming the information image on the medium together with the image to be formed,

wherein acquiring the encryption key includes generating and acquiring encryption key information based on the specified information.

2. The system as claimed in claim 1 ,

wherein

the information for representing the formation position is at least either

information determining a block in a case where the medium is virtually divided into blocks having a predetermined size, or

information representing the distance from a reference position provided on the medium.

3. The system as claimed in claim 1 ,

wherein

the accepting specification includes accepting at least one of predetermined information or the information regarding the formation result of the information image on the medium, and the predetermined information comprises:

the outer shape of the information image;

the page for forming the information image;

the number of the information images to be formed on the medium;

information regarding a character string contained in the formed information; and

information regarding a pattern contained in the formed information.

4. The system as claimed in claim 1 , wherein the acquiring an encryption key includes acquiring any of a plurality of given encryption key information pieces based on the specified information.

5. A system comprising:

a processor; and

a memory,

the processor configured to carry out instructions comprising:

accepting a medium where an information image representing encrypted information is formed, and reading the information image on the medium;

detecting a formation position of the information image on the medium and acquiring a decryption key based on the formation position; and

decoding the information represented by the read information image using the acquired decryption key, and outputting the decoded information,

wherein acquiring the decryption key includes generating and acquiring decryption key information based on specification of information representing the formation position on the medium at which the information image representing encrypted information is formed.

6. The system as claimed in claim 5 , wherein the acquiring the decryption key includes selecting one of a plurality of given decryption key information pieces.

7. The system as claimed in claim 5 , wherein the formation position of the information image includes at least either

information determining a block in a case where the medium is virtually divided into blocks having a predetermined size, or

information representing the distance from a reference position provided on the medium.

8. The system as claimed in claim 5 , wherein

detecting a formation position of the information image includes detecting at least one of predetermined information from the image formed on the medium, and acquiring the decryption key based on the detected information, and

the predetermined information comprises:

information representing the outer shape of the information image;

information regarding the page for forming the information image;

information representing the number of the information images to be formed on the medium;

information regarding a character string contained in the formed information; and

information regarding a pattern contained in the formed information.

9. A non-transitory computer readable medium storing a program causing a computer to execute a process for generating an encryption key and a decryption key to decrypt information from image information recorded on a medium, the process comprising:

accepting document information and target information which is an object of encryption;

accepting specification of information representing a formation position on a medium at which an information image based on the target information is formed;

acquiring an encryption key based on the specified information;

encrypting the target information using the acquired encryption key, and generating the information image based on the encrypted target information; and

outputting a command to the image forming device for forming the information image on the medium together with the image to be formed,

wherein acquiring the encryption key includes generating and acquiring encryption key information based on the specified information.

10. A non-transitory computer readable medium storing a program causing a computer to execute a process for generating an encryption key and a decryption key to decrypt information from image information recorded on a medium, the process comprising:

accepting a medium where an information image representing encrypted information is formed, and reading the information image on the medium;

detecting a formation position of the information image on the medium and acquiring a decryption key based on the formation position; and

decoding the information represented by the read information image using the acquired decryption key, and outputting the decoded information,

wherein acquiring the decryption key includes generating and acquiring decryption key information based on specification of information representing the formation position on the medium at which the information image representing encrypted information is formed.