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International Transaction Log


The ITL verifies transactions proposed by registries to ensure they are consistent with rules agreed under the Kyoto Protocol. Each registry sends transaction proposals to the ITL, which checks each proposal and returns to the registry its approval or rejection. Once approved, registries complete the transaction. In the event that a transaction is rejected, the ITL sends a code indicating which ITL check has been failed and the registry terminates the transaction.

pdf-icon Data Exchange Standard (6517 kB) (DES) coordinate the functions of systems when processing transactions. They define technical requirements for the communication between the ITL and registries. They also define the checks performed by the ITL, embodying the policy rules agreed by Parties for the accounting of their assigned amounts and their use of the Kyoto mechanisms.

Each registry is to be connected to the ITL through secure communication channels established across the Internet. These connections will allow a registry to receive an immediate response from the ITL, typically within a matter seconds after sending the transaction information.

The administrator of the ITL is the UNFCCC secretariat, which has awarded a contract for the development and operation of the ITL to leading companies in the field of IT services. The ITL is hosted at two commercially-operated data centres, one for primary operations and the other as a backup site, both located in the United Kingdom. A service desk, also based in the United Kingdom, has been put in place to support the administrators of the ITL, registries and the CITL.

RSA Forum


The ITL administrator has convened the Registry System Administrator Forum in order to ensure that technical and management issues across registry systems are effectively coordinated. The Forum met for the first time in April 2006 and typically meets as a full group three times a year. In addition, groups are established under the Forum to conduct more detailed work in preparing and implementing procedures of joint concern to administrators of all registry systems.  

Security Working Group


In 2013, the ITL administrator initiated the security working group.  The working group established objectives and made plans to adopt the ISO/IEC 27001 standard for managing the security of information assets within the systems supporting emissions trading under the Kyoto Protocol, as recommended in pdf-icon the 2012 report of the ITL administrator (562 kB) .

The objectives of the working group are to raise the awareness of all stakeholders involved in emission trading under the Kyoto Protocol of the need for information security and to ensure a comprehensive approach to information security management.

The working group initiated its work by defining and valuating the assets in the scope of securing emission trading related information. Based on the agreed scope, the working group analysed known threats and vulnerabilities, and agreed on a baseline of controls.

A baseline implementation evaluation confirmed that there are varying levels and degrees of maturity and stages in terms of information security within the different registries.  As it is important to understand the impacts, approach and planning of further implementation, the security working group currently is in the process of defining a viable plan and roadmap that will accommodate the different statuses and constraints. This roadmap will be finalized for consideration by SBI40 in June 2014.

Annual reports of the administrator of the international transaction log under the Kyoto Protocol