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  2. Digital selective calling - Wikipedia

    en.wikipedia.org/wiki/Digital_Selective_Calling

    A Distress DSC call is called an Alert. Urgency, Safety and Routine are called Announcements. Class A VHFs, used on commercial ships, have the ability to send distress, distress relay, all ships urgency, all ships safety, individual, group, geographic area and telephone alerts/announcements on DSC channel 70 (Digital channel reserved for DSC ...

  3. Form DS-160 - Wikipedia

    en.wikipedia.org/wiki/Form_DS-160

    On April 22, 2008, a final rule was promulgated by the U.S. Department of State offering the completely electronic Form DS-160 as a (voluntary for now) alternative to Form DS-156, though Form DS-156 would continue to be available for cases where it was needed. Form DS-156, although available electronically, needed to be signed manually, but the ...

  4. Public key infrastructure - Wikipedia

    en.wikipedia.org/wiki/Public_key_infrastructure

    Diagram of a public key infrastructure. A public key infrastructure (PKI) is a set of roles, policies, hardware, software and procedures needed to create, manage, distribute, use, store and revoke digital certificates and manage public-key encryption.

  5. Global Maritime Distress and Safety System - Wikipedia

    en.wikipedia.org/wiki/Global_Maritime_Distress...

    DSC is primarily intended to initiate ship-to-ship, ship-to-shore and shore-to-ship radiotelephone and MF/HF radiotelex calls. DSC calls can also be made to individual stations, groups of stations, or "all stations" in one's radio range. Each DSC-equipped ship, shore station and group is assigned a unique 9-digit Maritime Mobile Service Identity.

  6. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    The user application presents a hash code to be signed by the digital signing algorithm using the private key. An attacker who gains control of the user's PC can possibly replace the user application with a foreign substitute, in effect replacing the user's own communications with those of the attacker.

  7. Distinguished Service Cross (United States) - Wikipedia

    en.wikipedia.org/wiki/Distinguished_Service...

    The Distinguished Service Cross (DSC) is the United States Army's second highest military decoration for soldiers who display extraordinary heroism in combat with an armed enemy force. Actions that merit the Distinguished Service Cross must be of such a high degree that they are above those required for all other U.S. combat decorations, but ...

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