Complete Group Key Authentication Sample Clauses

Complete Group Key Authentication. M. (Assuming that Mi and Mj have the same view of the group membership.) An alternative de nition for complete group key authentica- tion is as authenticated group key agreement for all (Mi; Mj ) pairs (0 < i 6= j n). A-GDH.2 can be augmented to provide complete group key authentication as shown in Figure 4. (To better il- lustrate SA-GDH.2 and its di erences with respect to A- GDH.2, a 4-party example is shown in Figure 5.) The biggest change in the present protocol, SA-GDH.2, is the requirement for a priori availability of all members' long-term credentials. In e ect, each Mi is required to have two shared keys (one in each direction) with every other Mj . For every distinct ordered pair < i; j > (0 < i 6= j n) ij ij 1let < K ; K > denote the unidirectional key shared by ij Mi and Mj and its inverse, respectively. Although it may appear otherwise, individual key inverses of the form K The above protocol (A-GDH.2) achieves implicit key au- thentication in a relatively weak form since the key is not di- rectly authenticated between an arbitrary Mi and Mj (i j). Instead, all key authentication is performed through Mn . This may su ce in some environments, e.g., when the exact membership of the group is not divulged to the individual 5 This assumption is what makes active known-key attacks very do not need to be computed (see below).
Sample 1
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Related to Complete Group Key Authentication

  • Execution and Authentication At least one Officer must sign the Notes for the Company by manual or facsimile signature. If an Officer whose signature is on a Note no longer holds that office at the time a Note is authenticated, the Note will nevertheless be valid. A Note will not be valid until authenticated by the manual signature of the Trustee. The signature will be conclusive evidence that the Note has been authenticated under this Indenture. The Trustee will, upon receipt of a written order of the Company signed by an Officer (an “Authentication Order”), authenticate Notes for original issue that may be validly issued under this Indenture, including any Additional Notes. The aggregate principal amount of Notes outstanding at any time may not exceed the aggregate principal amount of Notes authorized for issuance by the Company pursuant to one or more Authentication Orders, except as provided in Section 2.07 hereof. The Trustee may appoint an authenticating agent acceptable to the Company to authenticate Notes. An authenticating agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the same rights as an Agent to deal with Holders or an Affiliate of the Company.

  • Authentication This Note shall not be valid until authenticated by the manual signature of the Trustee or an authenticating agent.

  • Authorization, Authentication, and Access In order to ensure that access to the Data is limited to authorized staff, the Contractor must:

  • Execution, Authentication, Availability and Dating of the Residual Certificates The Residual Certificates shall be executed on behalf of Xxxxxx Mae by an Authorized Officer of Xxxxxx Xxx under the corporate seal of Xxxxxx Mae, which may be in facsimile form and be imprinted or otherwise reproduced thereon, and shall be attested by the Secretary, Assistant Secretary, or a second Authorized Officer of Xxxxxx Xxx. The signature of any of these Persons on the Residual Certificates may be manual or facsimile. A Residual Certificate bearing the manual or facsimile signature of individuals who were at any time officers of Xxxxxx Mae shall bind Xxxxxx Xxx, notwithstanding that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Certificate or did not hold such offices at the date of such Certificate. At any time and from time to time after the execution and delivery of this Trust Agreement, Xxxxxx Mae may deliver Residual Certificates executed by Xxxxxx Xxx to the Certificate Registrar for authentication and the Certificate Registrar shall authenticate and make available such Certificates as provided in this Trust Agreement and not otherwise. No Residual Certificate shall be entitled to any benefit under this Trust Agreement or be valid for any purpose, unless there appears on such Residual Certificate a certificate of authentication substantially in the form provided for herein, executed by the Certificate Registrar by the manual or facsimile signature of one of its authorized signatories, and such certificate upon any Residual Certificate shall be conclusive evidence, and the only evidence, that such Residual Certificate has been duly authenticated and made available hereunder. Each Residual Certificate shall be dated the date of its authentication.

  • Execution Completion Authentication and Delivery (a) The Notes shall be executed on behalf of the Issuer by one or more officers of the Issuer authorized to do so pursuant to one or more resolutions of the Issuer, whose signatures may be manual or facsimile (an "Authorized Officer"). Notes bearing the manual or facsimile signature of an Authorized Officer shall bind the Issuer, notwithstanding that such person no longer serves as the official so authorized to execute the Notes prior to the authentication and delivery of the Notes or was not such an official at the date of execution of such Notes. The Global Agent shall have no responsibility to the Issuer to determine by whom or by what means a facsimile signature may have been affixed on the Notes, or to determine whether any facsimile or manual signature is genuine.

  • Access by and Authentication of Authorized Users Authorized Users of the Participating Institutions shall be granted access to the Licensed Materials pursuant to the following:

  • Execution, Authentication, Delivery and Dating of Rights Certificates (a) The Rights Certificates shall be executed on behalf of the Company by any of its Chairman of the Board, President, Chief Executive Officer and Chief Financial Officer. The signature of any of these officers on the Rights Certificates may be manual or facsimile. Rights Certificates bearing the manual or facsimile signatures of individuals who were at any time the proper officers of the Company shall bind the Company, notwithstanding that such individuals or any of them have ceased to hold such offices either before or after the countersignature and delivery of such Rights Certificates.

  • AUTHENTICATION OF FACSIMILE BIDS The act of submitting a Bid by facsimile transmission, including an executed signature page or as otherwise specified in the Bid Documents, shall be deemed a confirming act by Bidder which authenticates the signing of the Bid.

  • Executed and authenticated be executed manually or in facsimile by or on behalf of the Issuer and authenticated manually by or on behalf of the Fiscal Agent; and

  • Authentic Text This Agreement is drawn up in duplicate in the Danish, Dutch, English, Finnish, French, German, Greek, Italian, Portuguese, Spanish and Swedish languages, each of these texts being equally authentic.

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