The advantages and disadvantages of all kinds of classification of entrance guard system is as follows

Password identification password identification: by examining the input password is correct to identify the in and out of the authority. This kind of product is divided into two kinds: one kind is ordinary, one kind is out-of-order keyboard type ( The Numbers on the keyboard is not fixed, not automatically change) on a regular basis 。 Normal: advantages: easy to operate, do not need to carry the card; The cost is low. Weakness: the password can only accommodate three groups at the same time, easy to leak, security is very poor; Without access to records; Only one-way control. Order the keyboard type ( The Numbers on the keyboard is not fixed, not automatically change) on a regular basis Advantages: easy to operate, no need to carry the card, a little higher safety coefficient disadvantages: password easy to leak, high security or not; Without access to records; Only one-way control. The high cost. Card identification card identification: read card or card and password way to identify the access permissions, according to the card type is divided into: · card advantages: low cost; One man, one card ( + password) , security, computer, open the door to record the disadvantages: CARDS, equipment wear and tear, life is short; Card is easy to copy; Two-way control. Card information by external magnetic field loss, easy to make the card is invalid. Advantages: radio frequency card card, equipment out of contact, the door is convenient; Life is long, the theoretical data for at least ten years; High safety, can the microcomputer, has opened the door to record; Can realize two-way control. CARDS are difficult to copy. Disadvantages: the high cost of biological recognition biometrics: the biological characteristics of the method to identify inspection personnel. A fingerprint, palm, iris, face recognition, and finger vein type recognition, etc. Advantage: from the perspective of identification for security is very good; Do not need to carry the card disadvantages: high cost. High recognition rate is not high, the environmental requirements of the user requirement is high ( Such as a fingerprint can't scratch, eyes are not red bleeding, face, fenghua or beard how many) , the use of inconvenient, Such as iris and facial recognition model, must have the installation height position, but the user's height is different) It is worth noting that the average person believes biometric access system is safe, in fact this is a misunderstanding, entrance guard system safety is not only the security of recognition, also includes part of the safety control system, the safety of the software system, the safety of the communication system, power system security of the whole system as a whole, which do not pass, the whole system is not safe. Some fingerprint entrance guard system, for example, its controller and fingerprint identification devices are one and the same, want to install outdoors when installation, so that control lock switch line of Lou in the outside, it is easy to open. Qr code identification of qr code entrance guard system, combining with the characteristics of the qr code, will be to enter the campus students, teachers, parents, logistics staff send the qr code valid credentials, so parents when enter the campus to sweep qr code easier to read machine, so to facilitate the management of the in and out of the staff. As the school need to register the student guardian's phone number and the second generation id card of family, parents phone using qr code will be received in school campus entrance guard system platform to send text messages containing qr code. And will support the id card, phone verification, to ensure the in and out of the personnel safety. Features: 1, safe, simple, convenient and quick for the school, save time and manpower cost; The needs of the traditional personnel registration information too much trouble, at the same time, security is low. For parents also assured the child in the school's safety. 2, novelty, fashion qr code by mobile phone as a way to get forward, because cell phones are carry-on items essential to users, so very convenient. 3, the certificate validation of campus entrance guard system can support a variety of ways. 4, campus entrance guard system platform to provide accurate statistics, the university can be more specific, accurately grasp the in and out of the personnel information. The above information is for reference.