How to crack the access card?

There are three kinds of access cards: password access card, credit card access card and biometric access card. 1, password access control is to enter the password, the system judges that the password is correct, drives the electric lock, and opens the door for release. But its disadvantage is that it is slow, and it usually takes several seconds to enter the password. If there are too many people coming in and out, you need to queue up. If the input is wrong, it needs to be re-input, which takes a long time. Poor security, it is easy for people next to you to remember other people's passwords by gestures, and passwords are easy to forget or reveal. Trend: password access control is used less and less, and it is still only used in places with low security requirements, low cost and infrequent use. 2. Card access control is divided into contact card access control system (magnetic stripe card bar code card) and non-contact card access control system (also called inductive card radio frequency card) according to the types of cards. Contact card access control system has been used less and less because of its easy wear, less use and easy damage. It is only used in occasions related to bank cards (magnetic stripe cards), such as VIP access control system of banks, access control system of unattended ATM and other local industrial fields. Contactless IC card is the mainstream of the current access control system because of its durability, good cost performance, fast reading speed and high security. Therefore, at present, many people refer to the contactless IC card access control system as access control system for short. His shortcomings are: easy copying and cheating on attendance. If it is a large factory, it needs wiring and the cost is high. 3. Biometric access control is an access control system to identify people according to their different biological characteristics. Common ones are: fingerprint access control system (everyone's fingerprint features are different), handheld access control system (everyone's metacarpal shape is different), iris access control system (everyone's retina is different through optical scanning), portrait recognition access control system (everyone's facial features and position are different) and so on. The advantages are: no need to carry media such as cards, less repetition opportunities, difficulty in copying, and high security. One of its disadvantages is that the biological characteristics of human body are becoming more and more important password information, and its security must be protected. However, in the existing solutions, the comparison information is in the lock body or the background, and the lock body is easy to be maliciously destroyed, the chip storing the information is easy to be stolen, and the background data is more vulnerable to malicious attacks. Disadvantage two, high cost. Because biometrics needs to compare many parameters and features, the comparison speed is slow, which is not conducive to crowded occasions. Disadvantage 3: The biological characteristics of human body will change with the change of environment and time, so it is easy to produce rejection rate (obviously this person, but his biological characteristics have changed, but he is no longer himself), such as: fingerprints will change with seasons and humidity, palm shape and portrait will change with age, iris will change because of eye diseases and so on. Therefore, although the biometric access control system is advanced and safe, its application scope is limited, and it is only used in the fields with a small number of people, high security requirements and high cost, and it is not the mainstream of the access control system at present.