30results about How to "Solve the problem of tampering" patented technology

The invention provides a multimedia data encryption and decryption method and device. The encryption method specifically includes adopting a second level key for encrypting multimedia data and obtaining corresponding encryption key flow; adopting a first level key for encrypting a second level key and obtaining a corresponding transmission key. Since the encryption key flow and the transmission key are transmitted in the network and the first level key as a decryption key is not transmitted in the network, safety of the multimedia data in the network is ensured and a problem that the multimedia data is stolen or tampered is solved. Besides, the invention adopts the second level key for encrypting the multimedia data and adopts the first level key for encrypting the second level key, difficulty of decoding the encryption key flow is increased, thus the multimedia data transmission safety is further improved.

The invention provides a method for establishing a machine learning model to check webpage hidden links through domain identification and theme identification. The method comprises the steps of collecting a great number of webpage source codes which are marked as the webpage source codes comprising hidden links and the webpage source codes marked as the normal webpage source codes, and forming a training set based on the webpage source codes; extracting a risk text, risk degree, theme difference degree, a theme, a risk text vector, a risk text abnormal probability and the risk text length in each web page source code through suspicious domain identification, sensitive domain identification, secure domain identification, all-domain analysis and theme identification; carrying out model training on characteristic data of all web page source codes in the training set through utilization of a machine learning algorithm, thereby obtaining a classification distinguishing model; and importingthe characteristic data of to-be-predicted web page source codes into the classification distinguishing model, thereby obtaining a result of whether the to-be-predicted web page source codes comprisethe hidden links or not. According to the method, the highly mixed hidden link code identification effect is good, the feature extraction is relatively complete and the problem that a traditional method cannot accurately distinguish the hidden links and page tampering can be solved well.

The invention discloses a covert communication method, device and system based on a blockchain and an encryption technology, and the method comprises the steps that a data sender carries out the preprocessing of original communication data M through employing the symmetric encryption technology, obtains encrypted data M', and converts the encrypted data M' into a binary bit stream B_M'as transmission data; the data sender transmits the transmission data by adopting a P2P network of a block chain; the transmission step comprises: constructing a block chain address library, encoding a block chain address in the block chain address library, and sending the transmission data according to the encoded block chain address; and the data receiver receives and extracts the transmission data, converts the transmission data into encrypted data M', and decrypts the encrypted data M' to obtain original communication data M. According to the technical scheme, the problems that communication behaviorsand communication contents are easy to identify, information leakage is caused due to the fact that communication data is transmitted in a plaintext form, the communication data is easy to hijack andtamper, and a communication tool is centralized are solved.

The invention provides a permission management method and device, and the method comprises the steps: receiving a first access request message of a first user for accessing a ciphertext through a blockchain node, the ciphertext being uploaded to the blockchain node by a second user; judging whether the first user has legal access authority or not according to the first access request message; if the judgment result is yes, executing the step 2; and providing a secret key of the authorization information of the ciphertext to the first user, wherein the secret key is used for indicating the first user to decrypt the ciphertext, so that the problem that in the prior art, the authority of managing and accessing the special file through the central server is attacked or tampered by any person can be solved, the access authority is managed through the block chain, and the risk of being attacked or tampered is reduced.

The invention provides a tamper-proofing method and a tamper-proofing device for a dynamic library. A digital signature of a publisher is added when the dynamic library is distributed, when the dynamic library is updated, the digital certificate of the publisher is detected, and if the updated dynamic library is the correct dynamic library published by the publisher, the dynamic library is encrypted and backed up, so that the integrity of updated file data is ensured; In the program running process, whether the dynamic library is tampered or not is checked regularly, if the dynamic library istampered, the tampered dynamic library is replaced with the backup dynamic library, and the dynamic library is prevented from being tampered in the program running process.

The invention provides a WEB server and a data protection method. The WEB server comprises a database used for saving data, a data processing module used for intercepting an operation request for the database, and a terminal-to-computer multiplexer (TCM) chip used for authenticating a sending party of the operation request to obtain an authentication result, wherein the data processing module is also used for performing access operation on the database according to the operation request after the authentication result indicates that the sending party passes the authentication, and returning an access result to the sending party of the operation request. The invention greatly improves the security of the database of the WEB server.

The invention discloses an encrypted document processing method and system, and the method comprises the steps: taking each page of an original secret-related document as a document image, carrying out the encryption of the document content contained in each document image from a multi-dimensional angle based on the digitalization features of an electronic document or the black and white color distribution features of a paper document, generating a digital watermark containing encryption information, embedding the digital watermark into an original secret-related document to obtain an encrypted document, determining the encryption level of the encrypted document according to the use frequency of the original secret-related document, and when an operation instruction for the encrypted document is received, determining whether the operator has the operation authority of executing the operation content contained in the operation instruction on the encrypted document or not according to the identity contained in the operation instruction, and operating the encrypted document by the operator only after the verification is passed. Therefore, the problem that the secret-related document is divulged and tampered is effectively solved.

The invention provides a security check and repair method and device for an HDFS storage platform. The device is arranged on an HDFS storage platform and comprises a name node and a data node, whereinthe name node is used for managing storage data node information of a file block, receiving a query request, sent by the data node, of a damaged file block, and returning backup storage data node information of the damaged file block to the data node; and the data nodes are used for storing the file blocks, periodically checking the stored file blocks, detecting whether the file blocks are damaged or not, downloading the data blocks from other data nodes according to backup storage data node information of the damaged file blocks returned by the name nodes, and completing the repair operationof the damaged file blocks. The file block check value is calculated by using the irreversible MD5 algorithm, the problem of file tampering possibly occurring in an original system is solved, the check reliability is ensured, the check interval is adjusted according to needs, and the check efficiency is improved.

The invention provides a long-term nursing insurance realization method based on a block chain, a storage medium and device. The method comprises the following steps: establishing a long-term nursinginsurance service block chain; automatically distributing the basic information of the insurers who do not collect the physical signs on the long-term nursing insurance service block chain to a manager collection personnel terminal; The administrative organization acquisition personnel terminal acquires physical sign data of the insured person according to the basic information of the insured person; Unrated insurer basic information and the sign data on the long-term nursing insurance service block chain are automatically distributed to a manager rating personnel terminal; the administrativeorganization rating personnel terminal calculates a rating result according to the basic information of the insured person and the sign data; and applying for a long-term nursing service according tothe rating result. The safety and traceability of the long-term nursing insurance service are ensured, the sharing is clear, the objectivity and accuracy of the rating result are ensured, and the userexperience is improved.

The invention discloses an archive secure storage and sharing system based on a hybrid block chain and an implementation method, belongs to the field of archive sharing, and aims to solve the technical problem of how to realize archive privacy protection, prevent archives from forging and tampering, enable authorized access of the archives, and improve the archive sharing speed. According to the technical scheme, the system comprises a storage layer which is used for storing shared files and protecting the files against tampering, and adopts an IPFS; a sharing layer which is used for recordinggenerated transaction information, providing evidences for tracing of the file sharing process, automatically executing identity authentication and guaranteeing safe sharing of files under the condition that no third party participates, and comprises a multi-layer block chain model and an intelligent contract on a block chain; and a user layer which is used for managing, updating, checking and sharing files, and is composed of participants. The method specifically comprises the following steps: initializing; identity registration and authentication; encrypting and storing the archives; and archive sharing.

The invention provides a signature method and device and a signature verification method and device of an image. The image is signed, a signature and/or security information required for signature verification is set at an image data header, thus browsing of image contents is not impacted, whether the image is already tampered with can also be verified, and the tampering problem of the image contents is effectively solved. The signature method of the image includes: using signature information to sign data of the image to obtain signature data; and setting the security information in a mark code area of an image file, and setting the data of the image in a data area of the image file, wherein the security information includes the signature information and the signature data.

The invention relates to the field of concrete quality traceability, and particularly discloses a concrete quality traceability method based on a block chain, and the method comprises the steps: a block chain system is constructed, a project is brought into the block chain system through a supervision mechanism, and a certificate is issued to an authenticated node; the concrete production user and the supervision project department input related information into a distributed account book through corresponding nodes; test piece manufacturing information is input into the RFID passive tag; and the detection unit checks the information in the RFID passive tag through the block chain system, and inputs the detection result into the distributed account book. According to the invention, the block chain technology is adopted to solve the ciphertext robbery problem caused by a single network channel and the data tampering problem caused by server centralization and data management centralization, and the block chain technology is combined with the RFID anti-counterfeiting technology, so that the data sharing is realized, the user can be effectively prevented from tampering the data, and the security of the supervision system is greatly improved.

The embodiment of the invention discloses a file transmission method and device, a server, equipment and a medium. The method comprises the following steps: acquiring a file uploading online request of the intelligent equipment; wherein the file uploading online request carries a code ID of the intelligent device, abstract information of an original file and first abstract information of an encrypted file; generating an uploading mark character according to the code ID of the intelligent device, and returning the uploading mark character to the intelligent device; receiving a file content uploading request sent by the intelligent device; wherein the file content uploading request carries an uploading mark character and encrypted file content; verifying the uploaded mark character; verifying the encrypted file content and the decrypted file content of the encrypted file content; storing decrypted file content. According to the embodiment of the invention, the content of the encrypted file and the content of the decrypted file can be verified, the problem that the content of the file is tampered in the transmission process is solved, and the reliability and integrity of file contenttransmission are effectively improved.

The invention provides a workflow engine system based on a public chain platform and an implementation method thereof, and the system comprises: a workflow engine core module DApp which is used for carrying out the structured display of the data content needing to be input by a user, customizing the content of a form according to a business demand, carrying out the uplink of the customized form content, allowing a user to customize a process according to different business logic characteristics, executing process circulation, realizing data interaction with a third-party system, and performing uplink on data generated in the running process of the execution flow circulation; the workflow engine external first function module DApp; the workflow engine external second function module DApp; and the data block module that is used for storing the data and trace data chained on the workflow engine core module DApp. According to the invention, the problem of data loss caused by tampering of database data or attacking of the database by hackers can be avoided, so that the safety of the workflow engine is improved, and meanwhile, the availability of the workflow engine is greatly improved.

The invention provides a container security execution method and device and a storage medium, and the method comprises the steps: building a main monitor and a plurality of sub-monitors based on an SGX, and carrying out the management of a container through the main monitor and the plurality of sub-monitors; the method comprises the following steps: in response to the first starting of a container system, carrying out integrity measurement on a structural file of the container system, calculating an integrity measurement value of the structural file of the container system, and storing the integrity measurement value as an integrity measurement base value of the container system to a main monitor. The problem that containers in the same Network Namespace can access each other is solved, the problem of isolation between the containers is solved, and malicious attack behaviors of untrusted containers are prevented by setting a container network white list and limiting the access capability of other containers to the running containers. The problems that the integrity and legality of a code segment and a stack function return address are verified when a container runs, the code segment is tampered when the container runs, and the stack function return address overflows are solved.

The invention is suitable for the technical field of electronic information, and provides a battlefield situation awareness method and system and terminal device. The method comprises the steps that first equipment collects first battlefield information of the place where the first equipment is located; the first device performs hash processing on the first battlefield information to obtain a first hash value; the first device encrypts the first battlefield information, the first hash value and a first identifier of the first device according to a preset algorithm, and broadcasts a ciphertext obtained by encryption in the block chain network; the second device decrypts the ciphertext according to the preset algorithm; and when the number of the second devices passing the consensus verification meets a second preset condition, the first device and all the second devices add the first battlefield information, the first hash value and the first identifier of the first device into respective maintained block chains. According to the invention, the data security of the battlefield situation awareness system can be improved.

The invention provides a block chain-based judicial electronic delivery management method and system. The method comprises the following steps: 1, uploading a judicial document in an electronic format to a court system; 2, encrypting and storing the judicial document at a server side by using the identity label of the addressee; 3, the court system searching the matched address data according to the identity label of the addressee, and achieving the address information sharing; 4, sending the encrypted electronic judicial document to the party through the shared address information; 5, the party receiving the electronic judicial document and then returns a delivery receipt; 6, collecting electronic data in the electronic delivery process, constructing electronic evidence of the whole process behavior, and completing authenticity examination and evidence fixation; and 7, subjecting the fixed electronic evidence to uplink evidence storage for sharing and tracing of each court node. According to the invention, by adopting the information association fusion technology of the multi-source address base, the addressee is positioned to the greatest extent, and the problem of difficulty in delivery is solved.