88 results about "Forensic identification" patented technology

A system and method for employing memory forensic techniques to determine operating system type, memory management configuration, and virtual machine status on a running computer system. The techniques apply advanced techniques in a fashion to make them usable and accessible by Information Technology professionals that may not necessarily be versed in the specifics of memory forensic methodologies and theory.

The present invention leverages a series of media watermark locations to provide information relating to media ownership and / or distribution source. This provides a forensic means to establish a source of media with a high degree of certainty despite malicious and / or non-malicious attacks. By providing embedded user unique identification, a source of copied media can be determined without the embedded information substantially interfering with the intended purpose of the media itself. In one instance of the present invention, digital media is transformed into an N-dimensional media signal. User unique keys are then utilized along with a master key to determine locations for embedding a watermark signal that possesses substantially similar quantized statistics as the transformed media signal. The watermark signal is then embedded into the media signal, fingerprinting the media.

This invention relates in general to a method for molecular fingerprinting. The method can be used for forensic identification (e.g. DNA fingerprinting, especially by VNTR), bacterial typing, and human / animal pathogen diagnosis. More particularly, molecules such as polynucleotides (e.g. DNA) can be assessed or sorted by size in a microfabricated device that analyzes the polynucleotides according to restriction fragment length polymorphism. In a microfabricated device according to the invention, DNA fragments or other molecules can be rapidly and accurately typed using relatively small samples, by measuring for example the signal of an optically-detectable (e.g., fluorescent) reporter associated with the polynucleotide fragments.

The invention provides methods permitting the detection of small amounts of different nucleic acids in the presence of an excess amount of wild-type nucleic acids. Also provided herein are method so detecting infectious disease minority variants, methods of forensic identification, methods of diagnosing cancer and monitoring disease progress.

A short tandem repeat (STR) typing method and system are developed for forensic identification of individual cells. Agarose-in-oil droplets are produced with a high frequency using a microfluidic droplet generator. Statistically dilute single cells, along with primer-functionalized microbeads, are randomly compartmentalized in the droplets. Massively parallel single-cell droplet PCR is performed to transfer replicas of desired STR targets from the single-cell genomic DNA onto a coencapsulated microbead. These DNA-conjugated beads are subsequently harvested and reamplified under statistically dilute conditions for conventional capillary electrophoresis STR fragment size analysis. The methods and systems described herein are valuable for the STR analysis of samples containing mixtures of cells / DNA from multiple contributors and for low concentration samples.

The present invention relates to dyes in general. The present invention provides a wide range of dyes and kits containing the same, which are applicable for labeling a variety of biomolecules such as nucleic acids, cells and microorganisms. The present invention also provides various methods of using the dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and / or treatment of disease conditions.

The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and / or treatment of disease conditions.

The invention relates to an extraction kit, an extraction method and a detection method for drugs in hair. The extraction kit comprises a composite extract containing a disulfide bond reducing agent,a hydrogen bond blocker, a hair expansion agent and a solvent, wherein the composite extract is alkaline and has a pH of 8.5 to 10. The extraction kit for drugs in hair hydrolyzes the hair by using areduction method with no need of special pulverizing equipment and extraction equipment during the pretreatment and with short hydrolysis time and simple operation of the whole extraction process, andthe reduction method is more suitable for the requirements of rapid detection of laboratory forensic identification compared with the conventional methods such as acid methods, alkali methods, methanol solvent methods, buffer salt solution methods and enzymatic methods. Furthermore, the reagents used in the composite extract in the extraction kit are all water-soluble reagents, which are easy tobe extracted by the organic reagent liquid, so that the solution to be detected can be quickly separated. And the reagents used are basically pollution-free to the environment, non-toxic to the operator, easily removed without residue, and basically damage-free to instruments and equipment.

A system and method for personal digital technology forensics. The system and method can provide for the forensic identification, preservation, acquisition, analysis, presentation, exportation, and correlation of evidence obtained personal digital technologies including that obtained from cellular phones, personal digital assistants (PDAs), and smart phones.

The invention discloses hair cracking solution. The cracking solution comprises the following proportions of components: 10mmol / L of Tris-Cl (pH is 8.0), 100mmol / L of NaCl, and 1mmol / L of CaCl2, 20-200mmol / L of DTT, 0.5%-5.0% of SDS (mass concentration), 0.5%-4% of Triton X-100 by volume and 0.2-2mg / ml of protease K, wherein, a solvent is sterile double-distilled water. Compared with the existing hair digestive juice, the cracking solution has the advantages of largely shortened digestion time and greatly improved digestive efficiency, and the cracking solution provides a new way for forensic identification and clinical diagnosis.

The invention discloses a STR gene data analysis method. On the basis of C + + language, short tandem repeat (STR) gene sequencing data in DNA is subjected to positioning full-automatic analysis, thedata processing efficiency is integrally improved, a gene region associated with specific characters is finally obtained, and a rich positioning result display chart is provided. The algorithm supports analysis of multi-color fluorescence channels, supports the kit commonly used in the market at present, suports an original data file format output by a common sequencer, can automatically identifyand remove miscellaneous peaks generated in inspection, and can automatically calibrate peak pattern dislocation generated in the sequencing process. According to the invention, full-automatic data analysis of a multi-color fluorescence color channel is carried out on a DNA gene short tandem sequence STR in DNA identification and detection by a forensic medicine. The situation that DNA sequencingonly depends on foreign software analysis is broken through, a process is established for developing domestic sequencers and domestic reagents in China, and a domestication development process in thefield of forensic identification and detection of DNA in China is accelerated.

The invention discloses a medicolegal identification method of species and belongs to the technical field of medicolegal identification. The medicolegal identification method is characterized in that a biological sample mtDNA as a template and a 12SF1 / 12SR, 12SF2 / 12SR, COX1F / COX1R and 16SF / 16SR primer pair mixture as primers are subjected to PCR amplification; and PCR products are subjected to agarose gel electrophoresis, wherein when three electrophoretic bands are produced, the detected biological sample is human tissue, and when two electrophoretic bands are produced, the detected biological sample is animal tissue. The medicolegal identification method has the advantages that the seven primers of 12SrRNA, 16SrRNA and COX1 are subjected to multiplex amplification and the primers are subjected to specificity validation so that human and common animals comprising rhesus monkey can be distinguished; through three-primer multiplex amplification and two internal references, a result is more credible; and the medicolegal identification method has pg grade of sensitivity.

The invention provides a method and apparatus for extracting a voiceprint spectrum. The method includes: acquiring a sample voice signal and converting the same into a log-domain spectrum; extracting the voiceprint factor of each frame of the sample voice signal by using a pre-trained voiceprint factor extraction model and extracting the content factor of each frame of the sample voice signal by using a pre-trained content factor extraction model based on the log-domain spectrum; training a content spectrum reconstruction model for reconstructing the content factor into a content spectrum and a voiceprint spectrum reconstruction model for reconstructing the voiceprint factor into a voiceprint spectrum based on the extracted content factor and the voiceprint factor; and discarding the content spectrum reconstruction model, inputting a target voice signal into the voiceprint spectrum reconstruction model to obtain the voiceprint spectrum in the target voice signal. The method and apparatus can accurately extract the voiceprint spectrum from the voice signal so as to subsequently and clearly observe the characteristics of a speaker according to the extracted voiceprint spectrum to help improvement in the accuracy of the voiceprint verification in the fields of forensic identification and identity identification.

The invention discloses a reagent used for ex vivo expansion and a method thereof, comprising an adaptor, a primer, a promoter, a restriction enzyme, and the like. The aim of RNA ex vivo expansion is achieved. Target RNA in the invention is connected with the adaptor and is expanded after RT-PCR under the existing of the primer. Then, a stem-loop structure is used for forming a unique site of the restriction enzyme. A product obtained through the restriction enzyme is promoted by the promoter and is transcribed to obtain a sequence which is totally the same with the target RNA sample except a G is added on 5' end and an A or C is added on few 3' ends. The RNA product can be directly used as the original sample RNA. The reagent used for the ex vivo expansion and the method thereof can be applied to various aspects related to the application of RNA, and the like, including general scientific research, medical assay and forensic identification.

The invention discloses a method and a device for judging the reliability of a timestamp of a document, which relate to the field of electronic data forensics identification. The method comprises thefollowing steps of: acquiring a timestamp recorded by a file to be judged in a file system, and converting the timestamp into a decimal system; determining the number of last zeros of the timestamp asN; when the N) = preset threshold value n, it is judged that the timestamp of the file to be judged is not trustworthy. The technical proposal of the invention can effectively judge whether the timestamp information of the file is tampered with, can conveniently detect a large number of files, improves the reliability of the electronic data of the file, and fills the blank of the timestamp trustworthiness judging method of the file.

The present invention relates to dyes in general. The present invention provides a wide range of dyes and kits containing the same, which are applicable for labeling a variety of biomolecules such as nucleic acids, cells and microorganisms. The present invention also provides various methods of using the dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and / or treatment of disease conditions.

The invention relates to a non-uniform fingerprint extraction and comparison method for camera light response based on combined feature representation. Firstly, the input image is preprocessed such asnormalization, color space conversion and the like. Secondly, saturation, chrominance, brightness, edge region, texture region and flat region of the input image are detected as candidate regions ofinterest. Then, the image is cut into color blocks of specified size according to the above information, and these color blocks are divided into six subsets; Finally, the color blocks in six subsets are sent to the residual network respectively, and the non-uniform fingerprint of camera light response in each color block is extracted by depth learning method, and a fingerprint extraction system isformed by pre-training, which is used for source camera identification. The method has the advantages of uniqueness and good robustness, and can detect the non-uniformity fingerprint of camera lightresponse quickly and accurately, and is suitable for forensic identification, check anti-counterfeiting, image matching, information security and other fields.

The invention realizes the automatic generation of the appraisal opinion and the appraisal electronic archives through the management of the judicial appraisal, and rapidly makes the appraisal opinionand the appraisal electronic archives, and improves the efficiency of the judicial appraisal. A management method of forensic identification is disclosed, which is characterize in that that method comprises the following steps: 1, recording acceptance information and entrustment information of an identified case and judging whether the case is accepted; if the case is accepted, structurally saving the acceptance information and the entrustment information in the database; 2, collecting identification record information and uploading the identification record information to a database; 3, reading the acceptance information, the entrustment information and the appraisal record information in the database, and automatically generating an appraisal opinion; 4, examining the generated appraisal opinion, and if it passes the examination, making the appraisal opinion out of the case; 5, uploading the verified appraisal opinion and archived documents, and automatically generating the appraisal electronic archives for archiving.

The invention discloses a forensic identification organization information management system, which at least comprisesan organization information management unit, a service intelligence auxiliary unitand an information publishing unit. The organization information management unit is configured to manage and maintain basic information of the forensic identification organization. The service intelligence auxiliary unit is configured to manage a service processing flow of a forensic case from a received case to a case filing; The information publishing unit is configured to publish internal information and external information. The system can automatically generate acceptance notice according to the appraisal materials provided by the entrusting party, and can automatically carry out comprehensive analysis according to the appraisal materials provided by the entrusting party and the effective forensic medical examination records, so as to obtain the laws, regulations and articles matching the case for the appraiser's reference rating, and reduce the artificial subjective factors' influence. Through the information management of the judicial appraisal institutions, the system can reduce the labor workload, standardize the appraisal operation procedures, greatly improve the work efficiency.

The invention provides an Android digital forensics-oriented user behavior analysis method. The method comprises the following steps: S1, acquiring Android forensics data; S2, determining a forensics identification event according to a digital forensics rule and the forensics identification requirement; S3, performing correlation analysis on the forensics identification event and a digital forensics identification method, and determining the digital forensic identification method; S4, analyzing the Android forensics data by using the digital forensic identification method, and obtaining a digital forensic identification event analysis result; S5, performing correlation analysis on the digital forensic identification event analysis result and a user behavior, and obtaining a correlation analysis result; S6, performing forensics analysis on the user behavior according to the correlation analysis result by using a data mining method, and obtaining an Android digital forensic user behavior analysis result; and S7, showing the Android digital forensic user behavior analysis result. According to the method, the Android digital forensic user behavior analysis result is realized.

The invention relates to high-specificity nucleic acid detection in the fields of basic research (gene expression regulation, biological evolution, species identification and genotyping) and application research (drug development, forensic identification, food and drug safety supervision, customs inspection and quarantine and the like), in particular to a high-specificity nucleic acid detection reagent and a using method thereof. The main components of the detection reagent include a specific probe for detecting a target nucleic acid strand and single-stranded nuclease capable of degrading single-stranded nucleic acid. The high-specificity nucleic acid detection reagent disclosed by the invention is simple and convenient to operate, fast and convenient, and high in cost performance, can meet the requirement of automation, is time-saving and labor-saving, and is convenient to realizing large-scale experiments and basic research.

The invention relates to a three-dimensional palatal wrinkle recognition method based on fractional Fourier transform and belongs to the technical field of forensic identification of human body biological characteristics. The method comprises the following steps: acquiring three-dimensional palatal wrinkle point cloud data in a mouth scanning mode; performing isometric slicing standardization processing on a three-dimensional palate wrinkle image; performing blocking and binarization processing on a palate wrinkle slice profile image; constructing a palatal wrinkle slice profile image database; extracting fractional domain characteristics of a palatal wrinkle curve in the palatal wrinkle slice profile image through fractional Fourier transform; carrying out feature selection on the fractional domain features based on an SVM-RFE method, and then selecting an optimal feature vector combination; and finally, carrying out three-dimensional palatal wrinkle identification. According to the method, the complexity of three-dimensional palatal wrinkle image recognition is simplified, rich palatal wrinkle slice profile curve characteristics can be extracted from a time domain and a frequencydomain by utilizing fractional Fourier transform, and the palatal wrinkle recognition effect is improved.