The invention provides an imaging system and a video processing method. The system comprises a video acquisition module used for acquiring an original video image; a privacy removing module; a face recognition module which is used for acquiring all face areas in the original video and extracting the feature vectors of the faces respectively; a feature vector change module which is used for changing the feature vector of the human face extracted by the human face recognition module into a forged human face feature vector; a face forging module which is used for forming a forged face according to the forged face feature vector formed by the feature vector change module; and a privacy-removed video generation module which is used for respectively covering the forged face formed by the face forging module on the original face of the original video to form a privacy-removed video. According to the invention, the privacy can be protected while the video is the effective security or commercial data.

Imaging system and video processing method

The invention discloses a method and device for guaranteeing network data security. The method comprises the steps that S1, a first matching module obtains to-be-sent original network data, judges whether a process name and a port number for sending the original network data belong to the process name and port number needing to be encrypted or not, identifies the original network data if the process name and the port number are the process name and the port number needing to be encrypted and performs a step S2, otherwise, does not identify the original network data and performs a step S5; S2,a second matching module judges whether a transmission destination IP address of the identified network data belongs to an IP address needing to be encrypted or not, performs a step S3 if the transmission destination IP address belongs to the IP address needing to be encrypted, otherwise, performs the step S5; S3, an encryption module encrypts the identified network data; S4, a second matching module sends the encrypted network data; and S5, the second matching module sends the original network data. According to the method and the device, sensitive network data and insensitive network data can be distinguished and only the sensitive network data is encrypted, so the consumption of system resources is effectively reduced.

Method and device for guaranteeing network data security

A computer-implemented method for content-agnostic referencing of a binary data file, the method comprising: determining a length of the binary data file, the length comprising the number of bits of the binary data file; for the determined length, generating all permutations of data of the determined length; locating an index within the generated permutations, wherein the index is the starting position of the binary data file within the generated permutations; and using the length and the index to indicate the binary data file.

Method and system for content agnostic file indexing

The invention belongs to the technical field of file encryption algorithms, and particularly relates to a file encryption method and device with higher randomness and higher confidentiality. The method comprises the following steps: analyzing an entrance file OFD/docx/xlsx. Xml to obtain document metadata, a document file position and a secret key; Analyzing the document file Document.xml to obtain the position and other information of the page file in the document file, including whether the document contains the digital signature Signeaus.xml or annotations Annotations. Xml or indexing information presented on the content. According to the invention, the original format and analysis scheme are maintained, and the plaintext content of the document can be normally identified even if the analysis end program is not transformed; A mechanism of linearization or segmented loading of an original format is reserved; The key content of the file is encrypted, and the security can still be maintained when the file is used for network transmission.

A file encryption method and device

The invention belongs to the field of information security, and relates to an improved encryption method for big data. In view of the fact that big data is not suitable to be all encrypted due to large volume, a selective encryption method is adopted. Only part of data is encrypted according to a rule or through selection. Data is compressed before encryption, which can enhance the security and reduce the storage space. Taking into account the possible problems brought about by encrypted ciphertext expansion, an encryption algorithm based on equal-length plaintext and ciphertext is adopted preferentially. Meanwhile, an optimal scheme reducing key management and ensuring security is proposed. A file can be encrypted and decrypted with fewer keys.

Improved encryption method for big data

The invention belongs to the field of information safety, and relates to a compression encryption method for a big data file. Because the big data file is large in data size and the total calculationburden of encryption is too large to complete, the method enables an original plaintext to be stored so as to reduce the reading and writing of data, especially the writing, achieves the covering of apart of encrypted plaintext, and enables a compressed and encrypted ciphertext to be stored independently. Different encryption methods have different advantages and disadvantages, the fully homomorphic encryption cannot solve a problem of all computing entrustment and is large in cost, some entrustment needs the encryption with a misguide function and other entrustment needs the general symmetric encryption, so an encryption method with the proper segmentation is selected according to the needs, and only a part of data is encrypted through a rule or selection. Meanwhile, an optimal scheme for reducing the secret key management and guaranteeing the safety is proposed, and the encryption and decryption of a file just need fewer secret keys. Meanwhile, the compression is introduced before the encryption, so as to reduce a data storage space, to reduce the calculation burden of encryption, and to improve the safety.

Compression encryption method for big data file

The invention relates to a cryptographic method of large files and belongs to the field of information security. The method takes into consideration of the huge data of the large files, is not suitable for all the encryption, and different encryption methods have different advantages and disadvantages, so full homomorphic encryption can not solve all of the delegates calculations, and encryption costs a lot, some require the use of misleading encryption, and some require only common symmetric encryption, so appropriate encryption is selected by subsection, and only partial data is encrypted by rule or selection. At the same time, the optimal scheme of reducing key management and ensuring security is proposed. The method requires only a small number of keys for file encryption and decryption.

Cryptographic method of large files

The invention belongs to the field of information security, relating to a large file encryption method. The method considers the phenomenon that a large file has huge data and is not suitable for full encryption, a large number of data will choose not to be encrypted, and in order to reduce the read and write of the data, especially the write, the method disclosed by the invention adopts the following steps: storing an original plaintext, covering part of the plaintext that is encrypted, and separately storing an encrypted ciphertext. As different encryption methods have different advantages and disadvantages, fully homomorphic encryption also cannot solve all delegated calculations, and a high cost of encryption is needed, an encryption mode with a misleading function is required for some data, and only a general symmetric encryption mode is required for other data, thereby, the appropriate encryption methods are segmentally selected as required, only part of the data needs to be encrypted according to rules or selections; and meanwhile, an optimum scheme for reducing key management and guaranteeing security is proposed, and thus the encryption and decryption of the files can be achieved by only using fewer keys.

Large file selective encryption method for reducing write

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Compression encryption method for big data file

Cryptographic method of large files

Large file selective encryption method for reducing write