Home

B.A.C.K. User Guide

1. On the EF_DGI1 part insert the data about the passport holder the value attribute is common for all passports The EF_DG2 part contains the data about the image of the document holder stored on the several jdataj as groups of 236 digits The value attribute is composed by the first 8 digits of the string that represents the image Remember the XML file needs to be stored on the Server repository folder 6 How it works B A C K is made by two components the passport named Server and the user program named Client Server Command python directory_B A C K Server Server py xml_file name The Server invokes the XML parser on the xml_file name that simulates the passport and extrapolates the data structure whose fields reflect the passport content Then the Server waits until a Client establishes a connection It is not necessary to invoke the Server if B A C K is used in real reader mode Watch out The Server start up module must be implemented on the destination machine This means that if the target is cipro dia unisa it the Server procedure must be invoked on the related machine If the target is localhost then you need to invoke the procedure on your own machine Client Command python directory_B A C K Client main py MinPassNum MaxPassNum MinBirth Date MaxBirthDate Sex M F MinExpiryDate MaxExpiryDate The Client makes a connection to the Server In case the parameters MinPassNum MaxPassNum Min BirthD
2. to your reader from the readers section is uncommented Simulation mode To configure B A C K to work in simulation mode open the RFIDIOtconfig py file from the Client directory and uncomment only the line readertype RFIDIOt rfidiot READER_ SOCKET from the readers section Moreover B A C K allows two access modes to the reader local mode and remote mode Local access mode To use the application in local access mode open the RFIDIOt py from the Client folder find the self socket connect string and check that the IP address is localhost Remote access mode To use the application in remote access mode open the RFIDIOt py from the Client folder find the self socket connect string and insert the server address e g myhost mydomain com 5 How to create a new passport for the simulator To create a new passport for the simulator you need to create a XML file containing the passport data they can be found by invoking the mrpkey py module Moreover you have to copy and rename one of the XML files from the Server repository folder Then open the new file with any text editor and modify the content as it follows The EF_SOD part is common for all the passports so there s nothing else to do The EF_SOD has as value attribute the first 8 digits of the string that contains the data of the digital certificate The other jdatalj jdatal5 are the remaining part of the certificate divided in 236 characters strings
3. B A C K User Guide version 0 3 August 10th 2008 1 Index 1 What is B A C K 2 Required software 3 How to configure B A C K 4 How to create a new passport for the simulator 5 How it works 6 Bugs 7 Fix 8 Next updates 9 Project members 10 Special thanks 2 What is B A C K B A C K is a python software that accesses the new generation e Passports B A C K uses the known information about passport s owner to attempt finding the character sequence used by the Basic Access Code protocol the Machine Readable Zone MRZ In case of success B A C K reads the entire content of the passports The operations can be performed both locally and remotely by means of a system that simulates the passport on a XML file 3 Required software The followed components are required to run B A C K Python for the language interpreter used by the libraries pylab for the primitives of numerical calculus pycrypt for the cryptography basic modules Imaging for images view pySerial for ACG or Frosch readers pyscard and PCSC Lite for the PC SC support OpenSSL to extract the public keys from the e Passports 4 How to configure B A C K B A C K can be configured to work both on a real reader connected to a passport and in simulation mode Real reader mode To configure B A C K to work as a real reader open the RFIDIOtconfig py file from the Client directory and check that the line relative
4. ate MaxBirthDate Sex M F MinExpiryDate MaxExpiryDate are passed the Client will start a procedure of exhaustive search to obtain the MRZ of the passport on the base of the inserted data If the parameters are not passed from the command line the application will ask the user to insert them one by one On both cases data always go through syntactic and semantic controls 7 Bugs Some problems were encountered during software development The window related to owner s data does not display the image the problem is caused by the specific format of the image stored inside the passport JPEG2000 The estimation of the maximum execution time refers to the machine that was used for the software testing simulated reader mode HP Compaq nx6125 AMD Turion 64 Mobile ML 32 CPU RAM 879 MB The application does not point out any HW SW change included the passage from real reader to simulated reader that could affect the effective execution time This entails the absence of the update of the maximum execution time In case of a severe error the server could crash and disconnect A Server restart is needed on such cases The application was not tested for multiple accesses Please point out any bug 8 Fix To update the estimation of the maximum execution time you need to launch the Client application and attempt a number of checks At the end of the execution the number of checks per minute is calculated by applying the following for
5. mula num_checks_per_minute 60 x num_checks_exec exec_time Once the number of checks per minute has been calculated open the Client main py file with a text editor find the string XXX and update the actually calculated value

B.A.C.K. User Guide

Contents

Download Pdf Manuals

Related Search

Related Contents