Batch Oblivious Transfer Sample Clauses

Batch Oblivious Transfer. ‌ 1 Oblivious Transfer (OT) protocol, more specifically OT 2 protocol, allows two parties (sender and chooser) to solve the following problem. The sender has two strings m0 and m1 and transfers one of them to the chooser in accordance with the following conditions: – the chooser selects a particular mb which he wishes to obtain (b ∈ {0, 1}); – the chooser does learn nothing about m1−b; – the sender does not know which mb was transferred. We modify and extend construction of RSA-based OT 2 protocol from [11]. Most oblivious transfer protocols employ some kind of ElGamal encryption. This results in increased computational overhead as the chooser must perform at least one modular exponentiation. Using RSA-based oblivious transfer allows to reduce the chooser’s complexity, since the public exponent can be made small. Moreover, RSA decryption with distinct private exponents can be implemented efficiently, leading to Batch RSA [5]. We use this idea for further improvement of computational complexity of RSA-based oblivious transfer. · We employ the following notation through the rest of the section. Let n = p q be an RSA public modulus (i.e. a product of two distinct primes p and q) and let e, d denote public and private exponents, respectively. Let Zn = {0, 1,...,n − 1} and let Zn∗ be the set of all numbers from Zn relatively prime to n. All ⊕ ∈ computations in protocol descriptions are defined over Zn, the only exception is bitwise xor operation . We will omit stating explicitly that our operations in the paper are mod n whenever it is clear from the context. The hash function H is modelled as a truly random function (random oracle, see [2]) in the security analysis. For simplicity we write H(a1,..., al) for the hash function applied to the concatenation of l-tuple (a1,..., al). Random, uniform selection of x from the set A is denoted by x R A. ∈ { } We assume the sender (S in protocol description) generates the instance of RSA system and the chooser (C) already has a valid public key of the sender (i.e. a pair (n, e)). Moreover, we assume that the length of H output is not shorter than strings m0 and m1. Recall, b 0, 1 denotes the index of string, which the chooser wants to obtain.
Sample 1
AutoNDA by SimpleDocs

Related to Batch Oblivious Transfer

  • COMMENCEMENT OF WORK UNDER A SOW AGREEMENT Commencement of work as a result of the SOW-RFP process shall be initiated only upon issuance of a fully executed SOW Agreement and Purchase Order.

  • Additional Acceptable Uses of Student Data Contractor is prohibited from using Student Data for any secondary use not described in this agreement except:

  • Your Billing Rights: Keep This Document For Future Use This notice tells you about your rights and our responsibilities under the Fair Credit Billing Act.

  • CONTRACTOR STAFF WITHIN AUTHORIZED USER AGREEMENT The provisions of this section shall apply unless otherwise agreed in the Authorized User Agreement. All employees of the Contractor, or of its Subcontractors, who shall perform under an Authorized User Agreement, shall possess the necessary qualifications, training, licenses, and permits as may be required within the jurisdiction where the Services specified are to be provided or performed, and shall be legally entitled to work in such jurisdiction. All Business Entities that perform Services under the Contract on behalf of Contractor shall, in performing the Services, comply with all applicable Federal, State, and local laws concerning employment in the United States. Staffing Changes within Authorized User Agreement

  • Deliverables for an Authorized User Agreement (Transaction Deliverables must be identified, as a measure of progress in the Authorized User Agreement. A Deliverable as a bulk number of hours is not permissible under the OGS Centralized Contract. Retainage As part of the Mini-Bid, the Authorized User may elect to retain a percentage of each individual Deliverable payment of no more than 20% until the acceptance of the complete Deliverable or project. This retainage may be reduced as described in the Mini-Bid, when the Contractor substantially reduces the time required from the timeframes negotiated between the Authorized User and the Contractor for the completion and acceptance of a Deliverable.

  • DATABASE OF RESTRICTED SUPPLIER The process of restriction is used to exclude a company/person from conducting future business with Transnet and other organs of state for a specified period. No Bid shall be awarded to a Bidder whose name (or any of its members, directors, partners or trustees) appear on the Register of Tender Defaulters kept by National Treasury, or who have been placed on National Treasury’s List of Restricted Suppliers. Transnet reserves the right to withdraw an award, or cancel a contract concluded with a Bidder should it be established, at any time, that a bidder has been restricted with National Treasury by another government institution. Thus signed by the Parties and witnessed on the following dates and at the following places: For and on behalf of For and on behalf of TRANSNET SOC LTD …………………………………………………… duly authorised hereto duly authorised hereto Name: Name: Position: Position: Signature: Signature: Date: Date: Place: Place: AS WITNESS: AS WITNESS: Name: Name: Signature: Signature: AS WITNESS: AS WITNESS: Name: Name:

  • Electronic Funds Transfer Agreement If you want to reverse an electronic re-presented check, you must give us an affidavit within 15 days after we send or make available to you the periodic statement that reflects payment of that electronic re-presented check. In your affidavit, you must declare and swear under oath that the electronic re-presented check was ineligible or unauthorized. If we receive a proper notice or affidavit from you within the 15-day period, we will recredit your account with the amount of the charge. If you wish to stop payment on any electronic re-presented check, you must follow the procedures contained in this Agreement for stopping payment of checks, not the procedures for stopping payment on electronic loan or xxxx payments. If you ask us to request the depositor’s bank to send us the original paper check or a copy of the paper check, and we provide it to you, you agree that you will not seek to have your account recredited due to a prior stop payment order or if the item is otherwise ineligible for collection.

  • Data Processing Agreement The Data Processing Agreement, including the Approved Data Transfer Mechanisms (as defined in the Data Processing Agreement) that apply to your use of the Services and transfer of Personal Data, is incorporated into this Agreement by this reference. Each party will comply with the terms of the Data Processing Agreement and will train its employees on DP Law.

  • F4 Transfer and Sub-Contracting F4.1 Except where clauses F4.5 and F4.6 both apply, the Contractor shall not transfer, charge, assign, sub-contract or in any other way dispose of the Contract or any part of it without prior Approval. All such documents shall be evidenced in writing and shown to the Authority on request. Sub-contracting any part of the Contract shall not relieve the Contractor of any of its obligations or duties under the Contract.

  • Sale of Note; Change of Loan Servicer; Notice of Grievance The Note or a partial interest in the Note (together with this Security Instrument) can be sold one or more times without prior notice to Borrower. A sale might result in a change in the entity (known as the “Loan Servicer”) that collects Periodic Payments due under the Note and this Security Instrument and performs other mortgage loan servicing obligations under the Note, this Security Instrument, and Applicable Law. There also might be one or more changes of the Loan Servicer unrelated to a sale of the Note. If there is a change of the Loan Servicer, Borrower will be given written notice of the change which will state the name and address of the new Loan Servicer, the address to which payments should be made and any other information RESPA requires in connection with a notice of transfer of servicing. If the Note is sold and thereafter the Loan is serviced by a Loan Servicer other than the purchaser of the Note, the mortgage loan servicing obligations to Borrower will remain with the Loan Servicer or be transferred to a successor Loan Servicer and are not assumed by the Note purchaser unless otherwise provided by the Note purchaser. Neither Borrower nor Lender may commence, join, or be joined to any judicial action (as either an individual litigant or the member of a class) that arises from the other party’s actions pursuant to this Security Instrument or that alleges that the other party has breached any provision of, or any duty owed by reason of, this Security Instrument, until such Borrower or Lender has notified the other party (with such notice given in compliance with the requirements of Section 15) of such alleged breach and afforded the other party hereto a reasonable period after the giving of such notice to take corrective action. If Applicable Law provides a time period which must elapse before certain action can be taken, that time period will be deemed to be reasonable for purposes of this paragraph. The notice of acceleration and opportunity to cure given to Borrower pursuant to Section 22 and the notice of acceleration given to Borrower pursuant to Section 18 shall be deemed to satisfy the notice and opportunity to take corrective action provisions of this Section 20.

Time is Money Join Law Insider Premium to draft better contracts faster.