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 Market Systems FAQs 

 
1. What is outlined in the I-SEM Technical Specification and where can I find these documents?



2. Will the SEM Market Participant Interface(MPI) and I-SEM Balancing Market Interface(BMI) work in parallel after Go-Live?



3. What authentication process will be used for the Balancing Market in I-SEM?



4. What are the client software system minimum pre-requisites for the Day-Ahead, Intra-Day and Balancing Markets?



5. Will backward compatibility be supported for transport mechanisms and digital signatures for I-SEM?



6. What digest of SHA2 will be used within I-SEM?



7. For the Day-Ahead Market, where do Participants get the ETS application and any associated credentials and certs?



8. How do Participants get access to the Settlements and Clearing platform SMSS?




1. What is outlined in the I-SEM Technical Specification and where can I find these documents?

The I-SEM Technical Specification (ITS) comprises a set of document volumes that evolve over time with the design, implementation, and updates to the market. It contains functional and technical information related to interfaces, reports, and connectivity requirements. The I-SEM Project will publish the volumes as the programme progresses. Please see here for the publications of the Technical Specification Documents.



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2. Will the SEM Market Participant Interface (MPI) and I-SEM Balancing Market Interface (BMI) work in parallel after Go-Live?

Yes, between I-SEM Go-Live and SEM Decommissioning, parallel running will exist. The SEM MPI will operate with reduced functionality after I-SEM Go-Live, before being decommissioned. The I-SEM BMI will be available for trial access during Market Trial.



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3. What authentication process will be used for the Balancing Market in I-SEM?

Participants who are accessing the Balancing Market via Type 2 interfaces will require two independent forms of authentication – a valid digital certificate and an application password.

Type 3 interfaces will not require an application password. However, the existing certificate password method will continue to be used for digitally signing market submissions. Specific information can be found here.

Specific details regarding Balancing Market security and user management may be found in the I-SEM Technical Specification (ITS): Volume B, on the I-SEM website here.

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4. What are the client software system minimum pre-requisites for the Day-Ahead, Intra-Day and Balancing Markets?

The client software system minimum pre-requisites for these markets are summarised in the table below.

These are the minimum specifications to run the ETS, M7 clients and browser access to the Balancing Market and are based on individual vendor inputs from each market. Participants may also choose to use separate machines for different markets*.



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5. Will backward compatibility be supported for transport mechanisms and digital signatures for I-SEM?

For the Balancing Market, backward compatibility cannot be supported for I-SEM.

  • TLS 1.1 (transport mechanism) and SHA1 (digital signature encryption algorithm) are vulnerable to attacks.
  • TLS 1.2 and SHA2 with RSA will be used.

Note: The I-SEM security standards have been upgraded in line with best practice following identification of vulnerabilities with previous standards.

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6. What digest of SHA2 will be used within I-SEM?

  • For the Balancing Market, SHA2-512 will be used.
  • For the Day-Ahead and Intra-Day Markets, SHA2-256 will be used.
  • For the Capacity Market, SHA2-256* will be used.

*Work remains ongoing with vendors

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7. For the Day-Ahead Market, where do Participants get the ETS application and any associated credentials and certs?

Registration for ETS will be part of the overall registration process which is still under development. Whilst application forms are not ready for publication, links to current EPEX and ECC forms are available on their websites. Credentials and certs will not be available until after all testing has been completed and members have been registered with the NEMO.

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8. How do Participants get access to the Settlements and Clearing platform SMSS?

The mechanism for members to engage with the Spot Market Settlement System (SMSS) is detailed in I-SEM Technical Specification Volume D available on the I-SEM website. Members will be provided with access to the SMSS after all testing has been completed and members have been registered with the NEMO. Please see here for the publications of the Technical Specification Documents.

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