CN111736783A - Self-service printing method based on block chain - Google Patents
Self-service printing method based on block chain Download PDFInfo
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- CN111736783A CN111736783A CN202010577899.9A CN202010577899A CN111736783A CN 111736783 A CN111736783 A CN 111736783A CN 202010577899 A CN202010577899 A CN 202010577899A CN 111736783 A CN111736783 A CN 111736783A
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- 238000007639 printing Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005516 engineering process Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
- G06F3/1222—Increasing security of the print job
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1224—Client or server resources management
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1238—Secure printing, e.g. user identification, user rights for device usage, unallowed content, blanking portions or fields of a page, releasing held jobs
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
- G07F17/26—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for printing, stamping, franking, typing or teleprinting apparatus
- G07F17/266—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for printing, stamping, franking, typing or teleprinting apparatus for the use of a photocopier or printing device
Abstract
The invention provides a self-service printing method based on a block chain, which comprises the steps of registering self-service printing equipment into the block chain to obtain a public key and a private key; the registration information of the self-service printing equipment is broadcasted in the block chain through an intelligent contract; setting user account information and authority of a mobile client, and binding a block chain account; customizing a user account encryption key through a mobile client; sending a printing request to acquire the intelligent contract and triggering printing, and transmitting a printing result back to a block chain through the intelligent contract; the intelligent contract is used for triggering the self-service printing equipment to control the self-service printing equipment according to the flow defined by the intelligent contract code. Compared with the related art, the self-service printing method based on the block chain guarantees data safety and personal privacy of the user.
Description
Technical Field
The invention relates to the technical field of block chains, in particular to a self-service printing method based on a block chain.
Background
Blockchains are essentially decentralized databases, originally limited to currency-like applications, with the continued development of blockchain technology, intelligent contracts are deployed on blockchains to enable trusted, traceable, and irreversible transactions without the involvement of third parties.
With the development of self-help economy, more and more self-help products enter our lives, which brings convenience to our lives or works to a great extent. The self-service printer is a self-service printing device which is increasingly widely applied, and can acquire information to be printed in the modes of card reading, scanning, manual input, network transmission and the like and print the information to be printed. Nowadays, the demand for printing documents or photos is increasing, and the self-service printer also facilitates the printing.
However, the existing self-service printer brings convenience to work and life of people, files printed by a user sometimes have personal privacy data or relate to secrets, the information is directly exposed to the self-service printer, and the problems of personal privacy and leakage of the confidential data are brought to the user
Therefore, there is a need to provide a new self-service printing method based on block chains to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a novel self-service printing method based on a block chain, which tracks a printing process by using a block chain technology and an encryption technology, encrypts user printing contents and practically ensures data security and personal privacy of a user.
In order to achieve the above object, the present invention provides a self-service printing method based on a block chain, which is used for a self-service printing device, and the method includes:
registering the self-service printing device in a block chain to obtain a public key and a private key;
broadcasting the information of the self-service printing equipment in a block chain network through an intelligent contract;
the intelligent contract is used for triggering the self-service printing equipment to control the self-service printing equipment according to the flow defined by the intelligent contract code.
Preferably, the method for a mobile client in communication with the self-service printing device comprises:
setting user account information and authority of a mobile client, and binding a block chain account;
customizing a user account encryption key through a mobile client;
and sending a printing request to acquire the intelligent contract to trigger printing, and transmitting a printing result back to the block chain through the intelligent contract.
Preferably, the intelligent contract includes a printing device uniqueness number, a model number, a public key, deployment time, node information, printing authority, and printing settings.
Preferably, the public and private keys are obtained by adopting an asymmetric encryption technology, the private key is stored in the self-service printing device, and the public key is broadcasted in the block chain through the intelligent contract.
Preferably, the encryption key is obtained by using a symmetric encryption technology, and the encryption key is stored in the mobile client.
Preferably, the self-service printing device adopts a printer supporting a trusted execution environment.
Preferably, the self-service printing device includes:
a communication module for communicating with a blockchain network;
the contract updating module is used for modifying the intelligent contract state by the block chain network according to the operation request;
the initialization module is used for initializing the authority and the control state of the self-service printing equipment;
and the trusted application module is used for protecting the confidentiality and the integrity of the resources and the data of the trusted application.
Preferably, the mobile client includes:
a request module for initiating a request procedure to a blockchain network;
the key management module is used for managing a self-defined encryption key;
the file management module is used for sorting and collecting files;
and the feedback module is used for uploading the feedback information of the user to the block chain network.
Compared with the related art, the self-service printing method based on the block chain has the following beneficial effects:
1. the use of blockchain techniques ensures the operational flow is secure and non-tamperable.
2. And the security and the privacy in the file transmission process are ensured by using symmetric and asymmetric encryption.
3. Secure printing of files is guaranteed using trusted execution environments (TEE technology).
4. After printing is finished every time, data of the user are destroyed in real time, and the data are guaranteed not to be used subsequently. The user evaluates and feeds back the uplink records, and the manufacturer or operator can collect relevant feedback for product and service optimization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:
FIG. 1 is a flow chart for a self-service printing device of the blockchain-based self-service printing method of the present invention;
FIG. 2 is a schematic structural diagram of a block chain-based self-service printing method according to the present invention;
FIG. 3 is a schematic diagram of an encryption structure of the block chain-based self-service printing method according to the present invention;
FIG. 4 is an interaction flow diagram of a block chain-based self-service printing method of the present invention;
FIG. 5 is an architecture diagram of a self-service printing device of the self-service printing method based on block chains according to the present invention;
fig. 6 is an architecture diagram of a mobile client of the blockchain-based self-service printing method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 4, a block chain-based self-service printing method is used in a self-service printing device 1, and the method includes:
s101, registering the self-service printing equipment in a block chain to obtain a public key and a private key; and obtaining a public and private key by using an asymmetric encryption technology in the block chain, wherein the public key is used for encryption, the private key is used for decryption, the private key is stored in the printing equipment, and the public key is public.
S102, broadcasting the registration information of the self-service printing equipment in a block chain through an intelligent contract; specifically, a unique number, a model number, a public key, deployment time, node information, printing authority, printing setting and the like of the self-service printing equipment are programmed in an intelligent contract, and the intelligent contract is sent to a block chain network; in order to trigger the intelligent contract by other request or response means in the blockchain.
The intelligent contract is used for triggering the self-service printing equipment to control the self-service printing equipment according to the flow defined by the intelligent contract code so as to automatically delete the printing file and other information and the like.
The method is applied to a mobile client 2 which is communicated with the self-service printing device, and comprises the following steps:
s103, setting user account information and authority of the mobile client, and binding a block chain account; the user registers through the mobile client, the user account information comprises user information, registration time, printing time and the like, the authority comprises a sending request, printing requirement setting, content feedback evaluation and the like, and the binding block chain account number is an identification of the user account in a block chain.
S104, customizing a user account encryption key through the mobile client; when the user account is generated, a user self-assigns a symmetric encryption key through a symmetric encryption technology, and the encryption key is stored in the mobile client.
And S105, sending a printing request to acquire the intelligent contract to trigger printing, and transmitting a printing result back to a block chain through the intelligent contract.
Referring to fig. 2 and fig. 3, a printing request is sent through a user account of the mobile client to obtain a public key of the self-service printing device in the intelligent contract, the mobile client encrypts a file by using an encryption key and sends the file to the self-service printing device, and meanwhile, the mobile client encrypts the encryption key by using the obtained public key and sends the file to the self-service printing device, and the self-service printing device adopts a printer supporting a trusted execution environment. In a trusted execution environment of the printer (specifically, running trusted application), a private key stored in the self-service printing device is firstly used for decryption to obtain an encrypted secret key of a file, then the encrypted secret key is used for decrypting the file to obtain an original file, the original file is printed, after the self-service printing device finishes printing, the printed file, the encrypted secret key and the like are destroyed, and the printing record is uploaded to a block chain network through the intelligent contract.
The TEE provides a secure execution environment that authorizes secure software (trusted applications, TAs), while also protecting the confidentiality, integrity, and access rights of the TAs's resources and data.
The TEE is a safe operation environment which runs in the self-service printing equipment and coexists with the printing system, provides a safe area in the connecting equipment to ensure that sensitive data are stored, processed and protected in an isolated and credible environment, and realizes end-to-end safety by providing isolated and safe execution authorization software. The existing printing equipment board can support TEE environment under the condition.
The TEE can create multiple security domains in the CPU, GPU, memory and peripherals by enforcing isolation through virtualization based on hardware support. Specifically, in this embodiment, the user uses the public key of the printing device to encrypt and transmit a ciphertext, the printing device stores a private key (only known to the printing device), and the ciphertext is decrypted to obtain the private key.
Specifically, assuming that the user key is secret, the printing device public key and the printing device private key are pk and sk, respectively, secret1 is obtained by encrypting secret using pk, secret1 is sent to the printing device, and the printing device obtains secret by decrypting secret1 using sk (this process is asymmetric encryption and decryption).
The TEE of the self-service printing equipment comprises an internal API and an external API, wherein the internal API of the TEE mainly comprises key management, a cryptographic algorithm, safe storage, safe clock resources and services, an expanded trusted UI and the like. The TEE external API is the underlying communication interface for client applications running in the printing system to access TA services and data.
The symmetric encryption technology is adopted for user encryption, and the symmetric encryption refers to an encryption algorithm using the same key for encryption and decryption, namely the encryption key can be deduced from the decryption key, and meanwhile, the decryption key can also be deduced from the encryption key.
Referring to fig. 4, the method for use in a blockchain network includes:
receiving an intelligent contract code from the self-service printing device, and initializing the self-service printing device according to the intelligent contract code;
and receiving a printing request from the mobile client, and returning the information in the intelligent contract to the mobile client for confirmation.
After the printing is finished, the user can evaluate the printing, or give feedback to the defects of the system, and the evaluation or feedback content broadcasts the uplink through the intelligent contract.
Referring to fig. 5, the self-service printing apparatus 1 includes: a communication module 11, configured to communicate with a blockchain network; the contract updating module 12 is used for modifying the intelligent contract state by the block chain network according to the operation request; the initialization module 13 is used for initializing the authority and control state of the self-service printing equipment; and the trusted application module 14 is used for protecting the confidentiality and integrity of resources and data of the trusted application.
Referring to fig. 6, the mobile client 2 includes: a request module 21, configured to initiate a request procedure to a blockchain network; a key management module 22, configured to manage a customized encryption key; the file management module 23 is used for arranging and collecting files; and a feedback module 24, configured to upload feedback information of the user to the blockchain network.
Compared with the related technology, the block chain-based self-service printing method has the advantages that the whole process is tracked through a block chain intelligent contract, all operations are basically interacted with the block chain, and the block chain-based self-service printing method has the characteristics of sufficient safety and incapability of being tampered; the self-service printing equipment encrypts the user file in an encryption mode, processes a decryption process and a printing process in a Trusted Execution Environment (TEE), and has enough safety.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A self-service printing method based on a block chain is characterized by comprising the following steps:
registering the self-service printing device in a block chain to obtain a public key and a private key;
broadcasting the information of the self-service printing equipment in a block chain through an intelligent contract;
the mobile client sends a printing request and acquires information in the intelligent contract;
the mobile client self-defines an encryption key and performs file encryption operation;
the mobile client sends printing information to the self-service printing equipment for printing, and uploads a printing result to a block chain through the intelligent contract;
the intelligent contract is used for triggering the self-service printing equipment to control the self-service printing equipment according to the flow defined by the intelligent contract code.
2. The blockchain-based self-service printing method according to claim 1, wherein the intelligent contract includes a printing device uniqueness number, a model number, a public key, deployment time, node information, printing authority, and printing settings.
3. The blockchain-based self-service printing method according to claim 2, wherein the public and private keys are obtained by using an asymmetric encryption technology, the private key is stored in the self-service printing device, and the public key is broadcasted in the blockchain through the smart contract.
4. The self-service printing method based on the block chain according to claim 2, wherein the encryption key is obtained by adopting a symmetric encryption technology, and the encryption key is stored in the mobile client.
5. The blockchain-based self-service printing method according to claim 2, wherein the self-service printing device employs a printer supporting a trusted execution environment.
6. The blockchain-based self-service printing method according to claim 1, wherein the self-service printing device comprises:
a communication module for communicating with a blockchain network;
the contract updating module is used for modifying the intelligent contract state by the block chain network according to the operation request;
the initialization module is used for initializing the authority and the control state of the self-service printing equipment;
and the trusted application module is used for protecting the confidentiality and the integrity of the resources and the data of the trusted application.
7. The blockchain-based self-service printing method according to claim 1, wherein the mobile client includes:
a request module for initiating a request procedure to a blockchain network;
the key management module is used for managing a self-defined encryption key;
the file management module is used for sorting and collecting files;
and the feedback module is used for uploading the feedback information of the user to the block chain network.
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| CN202010577899.9A CN111736783A (en) | 2020-06-23 | 2020-06-23 | Self-service printing method based on block chain |
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| CN202010577899.9A CN111736783A (en) | 2020-06-23 | 2020-06-23 | Self-service printing method based on block chain |
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| CN113596036A (en) * | 2021-07-30 | 2021-11-02 | 上海旷沃科技有限公司 | Cloud edge collaborative printing system based on block chain and bidirectional authentication method |
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| CN114969842A (en) * | 2022-07-29 | 2022-08-30 | 江苏羽驰区块链科技研究院有限公司 | Credible file approval and printing method based on block chain |
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Application publication date: 20201002 |