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  2. Trusted timestamping - Wikipedia

    en.wikipedia.org/wiki/Trusted_timestamping

    Trusted timestamping is the process of securely keeping track of the creation and modification time of a document. Security here means that no one—not even the owner of the document—should be able to change it once it has been recorded provided that the timestamper's integrity is never compromised.

  3. Time stamp protocol - Wikipedia

    en.wikipedia.org/wiki/Time_stamp_protocol

    The timestamp is the signer's assertion that a piece of electronic data existed at or before a particular time. The protocol is defined in RFC 3161 . One application of the protocol is to show that a digital signature was issued before a point in time, for example before the corresponding certificate was revoked.

  4. Year 2038 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2038_problem

    FreeBSD uses 64-bit time_t for all 32-bit and 64-bit architectures except 32-bit i386, which uses signed 32-bit time_t instead. [23] The x32 ABI for Linux (which defines an environment for programs with 32-bit addresses but running the processor in 64-bit mode) uses a 64-bit time_t. Since it was a new environment, there was no need for special ...

  5. ANSI ASC X9.95 Standard - Wikipedia

    en.wikipedia.org/wiki/ANSI_ASC_X9.95_Standard

    Time Stamp Authority (TSA) - The issuer of timestamps, which can be internal to an organization or a third party or external (as in an Internet-based service). The TSA receives its provable "trusted time" from one or more reliable time sources and generates the timestamps requested from it according to the X9.95 scheme.

  6. OpenTimestamps - Wikipedia

    en.wikipedia.org/wiki/OpenTimestamps

    OpenTimestamps (OTS) is an open-source [2] project that aims to provide a standard format for blockchain timestamping. [3] With the advent of systems like Bitcoin, it is possible to create and verify proofs of existence of documents (timestamps) without relying on a trusted third party; this represents an enhancement in terms of security, since it excludes the possibility of a malicious (or ...

  7. Network Time Protocol - Wikipedia

    en.wikipedia.org/wiki/Network_Time_Protocol

    Identifies the specific server or reference clock; interpretation depends on Stratum. Reference Timestamp: 64 bits Time when the system clock was last set or corrected, in NTP timestamp format. Origin Timestamp (org): 64 bits Time at the client when the request departed, in NTP timestamp format. Receive Timestamp (rec): 64 bits

  8. Adobe Acrobat version history - Wikipedia

    en.wikipedia.org/wiki/Adobe_Acrobat_version_history

    Adobe Reader is now Adobe Acrobat DC. Version 15.0.0 was released on April 7, 2015, supporting iOS 8.0 and above. [46] The new features include: Easily accomplish frequent tasks from the new Tools menu; View recent files across computers and devices with Mobile Link; Use free Adobe Fill & Sign to fill, sign, and send forms on your iPad

  9. Timestamp - Wikipedia

    en.wikipedia.org/wiki/Timestamp

    The term "timestamp" derives from rubber stamps used in offices to stamp the current date, and sometimes time, in ink on paper documents, to record when the document was received. Common examples of this type of timestamp are a postmark on a letter or the "in" and "out" times on a time card .