Law enforcement agencies across the United States have tools to access data stored on encrypted iPhones, and at least 2000 agencies across the country have access to data to further criminal investigations, according to a report. For a long time, the encryption debate has been centered on such a view: because of the use of encryption technology, law enforcement agencies can not obtain evidence from equipment and services, so it is necessary to require mobile phone manufacturers to set up an encryption system backdoor for law enforcement. But a new report says there is no need for backdoor access at all. < / P > < p > according to a report by upturn, a Washington based nonprofit, it is said that at least 2000 law enforcement agencies in all 50 states in the United States have access to locked and encrypted smartphones. This information is determined by analyzing the public records related to these institutions and their investigations over the years. It is believed that at least 49 of the 50 largest police departments in the United States have access tools, as well as some smaller towns and counties. For regions that don’t own these tools, they usually hand over their smartphones to the state or federal crime laboratories that usually have them to help with them. < / P > < p > these tools can take the form of grayshift’s graykey, a small device that can unlock the iPhone. Federal law enforcement and local police have been buying this tool for several years, and a program typically costs tens of thousands of dollars in hardware. When the police can’t complete the task with these tools, they can also send the equipment to cellebrite and other service agencies for unlocking. According to the invoice, cellebrite charged about $2000 per device to unlock and sold advanced tools to the Dallas police department for $150000. < / P > < p > the convenience of the tools also allows law enforcement agencies to use these devices frequently, ranging from major crimes such as homicide to minor crimes including shop theft, such as crimes involving about $220, and even fights over McDonald’s $70 food in Minnesota. It is estimated that hundreds of thousands of smartphones have been searched in the past five years. < / P > < p > although many organizations have these tools and are actively using them, some people still think that the existence of strong encryption technology is a problem. For law enforcement, the cost and time required to unlock devices remains a problem, with Manhattan district attorney Cyrus R. Vance Jr. testifying to Congress in December 2019: & quot; we may have the phone unlocked within a week, we may not unlock it for two years, or we may never. &The existence of these tools & quot; < / P > < p > has acted as a safety valve for encryption debates, suggests Riana pfefferkorn, a Stanford University researcher, but it has changed the requirements of law enforcement. &Now they’re not saying that we can’t get into the devices, they’re saying we can’t get into the devices quickly;. &This demand for speed of entry has led law enforcement officials to continue to call for change, forcing companies such as apple and Google to add backdoors to their services. In October, the U.S. Department of justice, in cooperation with other five eye countries, issued a statement calling for the creation of backdoors, insisting that backdoors were created to effectively take action against illegal content and activities without compromising security, while creating a back door that only law enforcement agencies can enter, thus maintaining the safety of others. Critics argue that the creation of backdoors in itself weakens the entire encryption technology, as hackers give priority to attacking backdoors, which can be used as a quick entry point for easier access to data. Didi Qingju bicycle has entered 150 cities