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2019-04-24T06:17:10Z

Created page with "{{#seo: |title= Block timestamp. All about cryptocurrency - zaoniao Wiki |keywords=Block timestamp, timestamp, block, time, hashing, timestamp cryptocurrency, timestamp blockc..."

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{{#seo:
|title= Block timestamp. All about cryptocurrency - zaoniao Wiki
|keywords=Block timestamp, timestamp, block, time, hashing, timestamp cryptocurrency, timestamp blockchain, timestamp wiki
|description=Block timestamp is accepted as valid if it is greater than the median timestamp of previous 11 blocks, and less than the network-adjusted time + 2 hours.
}}

Each [[block]] contains a [http://en.wikipedia.org/wiki/Unix_time Unix time] '''timestamp'''. In addition to serving as a source of variation for the [[Block_hashing_algorithm|block hash]], they also make it more difficult for an adversary to manipulate the blockchain.

==Description==

[[Blockchain]] technology allows decentralized trusted timestamping of information through a [[hash]].<ref>Decentralized Trusted Timestamping using the Crypto Currency Bitcoin: https://www.gipp.com/wp-content/papercite-data/pdf/gipp15a.pdf</ref>

A timestamp is accepted as valid if it is greater than the median timestamp of previous 11 blocks, and less than the network-adjusted time + 2 hours. "Network-adjusted time" is the median of the timestamps returned by all nodes connected to you. As a result, block timestamps are not exactly accurate, and they do not even need to be in order. Block times are accurate only to within an hour or two.

Whenever a node connects to another node, it gets a UTC timestamp from it, and stores its offset from node-local UTC. The network-adjusted time is then the node-local UTC plus the median offset from all connected nodes. Network time is never adjusted more than 70 minutes from local system time, however.

Bitcoin uses an unsigned integer for the timestamp, so the year 2038 problem is delayed for another 68 years.

==Souces==

[http://bitcoin.it/ http://bitcoin.it/]

==References==

[[Category:Technology]]
==See Also on BitcoinWiki==
* [[SWREG]]
* [[Manaty]]
* [[PrestaShop BItcoin Module]]
* [[Popmoney]]
* [[Chamber of Digital Commerce]]

Block timestamp - Revision history

Admin: Created page with "{{#seo: |title= Block timestamp. All about cryptocurrency - zaoniao Wiki |keywords=Block timestamp, timestamp, block, time, hashing, timestamp cryptocurrency, timestamp blockc..."