What does UTC mean

1. As the world's first "blockchain + luxury + finance" consensus mechanism, luxury chain UTC can trace the origin of jewelry and luxury goods, eliminate the false and retain the true through blockchain technology, build a blockchain business ecosystem of jewelry and jade instry, drive mode innovation of gold, jewelry and luxury instry through blockchain technology innovation, and help instrial upgrading and global development, In the high-end commodity transaction, consumers are most concerned about the authenticity of procts and the price level, so as to improve the transaction transparency. UTC has been researched and developed by the international top blockchain technology team for two years. Its core development ideas focus on application, standardization and security. At present, UTC projects have been implemented in nearly 100 businesses around the world, and a business ecosystem has been formed.

2.

What is a timestamp? Time stamp is a complete and verifiable data that can represent the existence of a data at a specific time point. So what's the use of timestamps

function of time stamp

the client is making a request to the server interface. If the request information is encrypted and intercepted by a third party, the request packet can be used for repeated request operation. If the server does not carry out anti replay attack, the server pressure will increase, and the use of timestamp can solve this problem

tamper proof: the common way to use is to splice parameters, the current project appkey, the "key" agreed by both parties, and add them to the dictionary dictionary set, sort them according to ABCD order, and finally encrypt them in MD5 +. The client sends the encrypted string and request parameters to the server together. After splicing and encrypting according to the above rules, the server compares whether it is equal to the incoming encrypted string

anti multiplexing: encryption in the above way can not solve the problem of anti multiplexing. At this time, it is necessary to generate UTC timestamps on the client and the server respectively. This UTC is to prevent your client and the server from not being in the same time zone, hehe, Then the timestamp can be spelled in the ciphertext, as for the effectiveness of anti reuse. Time stamp technology web link

3.

1. UTC is coordinated universal time, also known as world unified time, world standard time and international coordinated time

(2) coordinated universal time is a time measurement system based on atomic time seconds, which is as close as possible to universal time in time

The accuracy of international atomic time is nanoseconds per day, while that of universal time is milliseconds per day. Many application departments require the time system to be close to universal time ut. In this case, a compromise time scale called coordinated universal time appeared in 1972. To ensure that the difference between coordinated universal time and universal time does not exceed 0.9 seconds, positive or negative leap seconds will be added to coordinated universal time if necessary

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extended data:

< UTC related supplement:

1. Atomic time:

< P > time based on the precise definition of second. The basic unit of atomic time measurement: atomic time second, derived from atomic clock. The definition of atomic time and second: the ration of 9192631770 cycles of transition radiation between two hyperfine energy levels of cesium-133 atomic ground state in zero magnetic field

2. Stellar time

the time based on the star is not very accurate relative to the atomic time. Stellar time is the meridian value of the celestial sphere marked by astronomy and geodesy, which is a time system. It is a time measurement system based on the rotation period of the earth relative to the star, that is, from the rise of a star to the rise of the star again

reference source: Network UTC

4. Coordinated universal time, also known as universal time, world standard time, international coordinated time, referred to as UTC

time zone is the area on the earth, which uses the same time definition. When the international longitude conference was held in Washington in 1884, in order to overcome the confusion of time, the world was divided into 24 time zones. In China, the time of the East eight districts where the capital Beijing is located is the national unified time

for example: it is known that the time of Tokyo (East District 9) is 12:00 on May 1. What is the district time of Beijing (East District 8)? Beijing time = 12:00 - (9-8) = 11:00 (Beijing time is 11:00 on May 1).

5.

Does not belong to any time zone. Coordinated universal time, also known as universal time, world standard time, international coordinated time, referred to as UTC

time zone is the area on the earth, which uses the same time definition. When the international longitude conference was held in Washington in 1884, in order to overcome the confusion of time, the world was divided into 24 time zones. In China, the time of the East eight districts where the capital Beijing is located is the national unified time

For example, it is known that the time of Tokyo (East District 9) is 12:00 on May 1, and the district time of Beijing (East District 8) is calculated? Beijing time = 12:00 - (9-8) = 11:00 (Beijing time is 11:00 on May 1)

After the founding of the people's Republic of China in 1949, these time zones are no longer used in the mainland. However, after the Nationalist government moved to Taiwan, it still adopted the time zone division of 1912, and the standard time in Taiwan continued to be called & quot; Zhongyuan standard time

Beijing, the capital of China, is located in the East eight district, and the standard time of the East eight district is the standard time of China. However, China's time service center was built in Weibei, Shaanxi Province. Beijing time is determined by the atomic clock of Shaanxi Observatory, Chinese Academy of Sciences, with an error rate of less than one second every 300000 years

the time service center uses BPM short wave and BPL long wave to send standard signals, and local special time service units and radio and television systems use this as a benchmark to correct their own clocks before releasing time information to the public

6. Universal
time
coordinated (UTC)
GPS
there are two time distinctions in the system, one is UTC, the other is LT (local time). The difference between the two is that the time zone is different. UTC is the time zone 0, and the local time is the local time. For example, when Beijing is eight o'clock in the morning (eight eastern districts), the UTC time is zero, eight hours later than Beijing time, It can be calculated by this method

7. UTC
United Technology Corporation
Universal Sal time code
universal time coordinated
urban traffic control

8. Universal time coordinated (UTC)
there are two kinds of time distinctions in GPS system, one is UTC, the other is LT (local time). The difference between the two is that the time zone is different. UTC is the time zone 0, and the local time is the local time. For example, when Beijing is 8:00 a.m. (eight East districts), UTC is zero, and the time is eight hours later than Beijing time

9.

UTC (universal time coordinated) is the time zone

Beijing is the East 8, that is, UTC (+) 8

UTC 0 is London time