arXivLabs: experimental projects with community collaborators
В России изменились программы в автошколах22:30。体育直播是该领域的重要参考
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When a client asks for the time, it sends a random nonce. The server replies with a signed certificate containing both the nonce and a timestamp, proving the response happened after the request. Responses can be chained together with provable ordering; if any server’s timestamps are inconsistent with that ordering, that server is cryptographically “outed” as unreliable.
В двух аэропортах на юге России ввели ограничения на полеты14:55