A non-nominative, resilient biometric authentication system based on venous networks, comprising - a light source, preferably infrared, to illuminate a part of the body of a user, and - a detection device, comprising - a sensor for capturing without contact a venous network of said part of the body, - an extraction unit of biometric characteristics, and - a conversion unit of the biometric characteristics, the detection device having a unique identifier, - a first server, comprising a code generation unit; - a second server connected to the first server via a secure network and comprising - a code reception unit, - a code database, and - a correspondence determination unit, the second server containing no user identity, the detection device being characterized by: - the biometric characteristics extraction unit extracting a quantity of characteristics from the biometric information obtained by the sensor and generating a vascular imprint, - the biometric characteristics conversion unit being able to convert said vascular imprint, via a coding algorithm, combining the unique identifier of the detection device with the extracted characteristics, into a variable digital identifier, from so that said variable digital identifier is not linked to said user's vascular imprint, is generated without any nominative information of said user and is specific to said detection device; the first server being characterized by: - receipt of the variable digital identifier, - the data generation unit being able to generate codes using an anonymous location, date and information or a logistical or medical parameter transmitted by the detection device, - the encoding of said codes with the digital identifier into a final encoding, which is an alphanumeric sequence, the final result of all the codes, encrypted and concatenated together, and - transmission of said final encoding; the second server being characterized by: - reception of the final encoding by the code reception unit; - the code reception unit being able to convert the final encoding in order to extract and generate a unique code corresponding to each entered zone, and - the correspondence determination unit being able to compare the unique code generated by the code reception unit with the codes contained in the code database in order to determine an adequacy or no; - sending new coding information, with a different algorithm to said detection device to redo the last entry, in the event that the extracted code is unknown but has significant similarities and differences with an existing code in the database. - a light source, preferably infrared, to illuminate a part of the body of a user, and - a detection device, comprising - a sensor for capturing without contact a venous network of said part of the body, - an extraction unit of biometric characteristics, and - a conversion unit of the biometric characteristics, - a first server, comprising a code generation unit; - a second server connected to the first server via a secure network and comprising - a code reception unit, - a code database, and - a correspondence determination unit, - the biometric characteristics extraction unit extracting a quantity of characteristics from the biometric information obtained by the sensor and generating a vascular imprint, - the biometric characteristics conversion unit being able to convert said vascular imprint, via a coding algorithm, combining the unique identifier of the detection device with the extracted characteristics, into a variable digital identifier, from so that said variable digital identifier is not linked to said user's vascular imprint, is generated without any nominative information of said user and is specific to said detection device; - receipt of the variable digital identifier, - the data generation unit being able to generate codes using an anonymous location, date and information or a logistical or medical parameter transmitted by the detection device, - the encoding of said codes with the digital identifier into a final encoding, which is an alphanumeric sequence, the final result of all the codes, encrypted and concatenated together, and - transmission of said final encoding; - reception of the final encoding by the code reception unit; - the code reception unit being able to convert the final encoding in order to extract and generate a unique code corresponding to each entered zone, and - the correspondence determination unit being able to compare the unique code generated by the code reception unit with the codes contained in the code database in order to determine an adequacy or no; - sending new coding information, with a different algorithm to said detection device to redo the last entry, in the event that the extracted code is unknown but has significant similarities and differences with an existing code in the database.