Electronic device and method for extracting encrypted message

Patent metadata

Field	Value
Publication number	US-9602286-B2
Application number	US-201414265797-A
Country	US
Kind code	B2
Filing date	Apr 30, 2014
Priority date	Aug 22, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A method of an electronic device is provided. The method includes generating a key code by receiving a selection on at least one area from among areas of an image displayed, decrypting an encrypted message included in the image by using the generated key code, and determining whether to output the encrypted message by determining whether a hash code for the decrypted message is identical to a hash code for inputted text information.

First claim

What is claimed is:

1. A method in an electronic device, the method comprising:
displaying a first image including a first encrypted message and a first hash code;
receiving a selection of at least two areas from among a plurality of areas of the displayed first image;
reading coordinate values corresponding to the selected at least two areas;
generating a first key code for decrypting the first encrypted message based on the coordinate values corresponding to the selected at least two areas and a selected order of the selected at least two areas;
decrypting the first encrypted message by using the first key code;
generating a second hash code for the decrypted message; and
determining whether to output the decrypted message by determining whether the second hash code is identical to the first hash code.

2. The method of claim 1 , further comprising:
displaying a second image;
receiving text information;
receiving a selection of at least two areas from among a plurality of areas of the second image;
reading coordinate values corresponding to the selected at least two areas of the second image;
generating a second key code for encrypting the received text information based on the coordinate values corresponding to the selected at least two areas of the second image and a selected order of the selected at least two areas of the second image;
generating a second encrypted message by encrypting the received text information using the second key code;
generating a third hash code for the received text information; and
inserting the second encrypted message and the third hash code into the second image through a watermark.

3. The method of claim 1 , wherein the determining whether to output the encrypted message comprises:
when the second hash code is not identical to the first hash code, displaying a message that the encrypted message cannot be displayed.

4. The method of claim 1 , wherein the determining whether to output the encrypted message comprises:
when the second hash code is not identical to the first hash code, outputting a message that the encrypted message cannot be outputted as voice.

5. The method of claim 1 , wherein the determining of whether to output the encrypted message comprises:
when the second hash code is identical to the first hash code, displaying the decrypted message.

6. The method of claim 1 , wherein the determining of whether to output the encrypted message comprises:
when the second hash code is identical to the first hash code, outputting the decrypted message as voice.

7. An electronic device comprising:
a display module;
a processor configured to:
display a first image including a first encrypted message and a first hash code on the display module,
receive a selection of at least two areas from among a plurality of areas of the displayed first image,
read coordinate values corresponding to the selected at least two areas;
generate a first key code for decrypting the first encrypted message based on the coordinate values corresponding to the at least two areas and a selected order of the at least two areas,
decrypt the first encrypted message by using the first key code,
generate a second hash code for the decrypted message, and
determine whether to output the decrypted message by determining whether the second hash code is identical to the first hash code; and

a memory configured to store data controlled by the processor.

8. The device of claim 7 ,
wherein the display module is further configured to display a second image, and
wherein the processor is further configured to:
receive text information,
receive a selection of at least two areas from among a plurality of areas of the second image,
read coordinate values corresponding to the selected at least two areas of the second image,
generate a second key code for encrypting the received text information according to the coordinate values corresponding to the selected at least two areas of the second image and a selected order of the selected at least two areas of the second image,
generate a second encrypted message by encrypting the received text information using the second key code,
generate a third hash code for the received text information, and
insert the second encrypted message and the third hash code into the second image through a watermark.

9. The device of claim 7 , wherein the processor is further configured to operatively control the display module to display a message that the encrypted message cannot be outputted if the processor determines that the second hash code is not identical to the first hash code.

10. The device of claim 7 , further comprising:
a speaker,
wherein the processor is further configured to operatively control the speaker to output a message that the encrypted message cannot be outputted as voice if the processor determines that the second hash code is not identical to the first hash code.

11. The device of claim 7 ,
wherein the processor is further configured to operatively control the display module to display the decrypted message if the processor determines that the second hash code is identical to the first hash code.

12. The device of claim 7 , further comprising:
a speaker,
wherein the processor is further configured to operatively control the speaker to output the decrypted message as voice if the processor determines that the second hash code is identical to the first hash code.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bae Hyung-Jin
• Yoon Je-Han
• Cho Jeong-Heui

Classifications

• G06F2221/2107

  File encryption · CPC title

• H04L9/0861

  Generation of secret information including derivation or calculation of cryptographic keys or passwords · CPC title

• G06F21/16

  Program or content traceability, e.g. by watermarking · CPC title

• G09C5/00

  Ciphering apparatus or methods not provided for in the preceding groups, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages · CPC title

• H04L9/3239 Primary

  involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD · CPC title