*5.1. Security Threats*

Security threats to the proposed service model for the transfer between blockchainbased heterogeneous cryptocurrencies and CBDCs are identified as follows:

• (ST-1) Breach of contract by originator's transfer agents: If the originator's transfer agents and the beneficiary's transfer agents are not the same entity (for example, see Figure 3), the originator's transfer agents may not pay the transfer amount excluding the transfer fee to the beneficiary's transfer agents. This threat may lead to the beneficiary's transfer agents not transferring the cryptocurrencies and CBDCs to the beneficiary. As a result, the transfer between cryptocurrencies and CBDCs will fail;


The security threats are specific to the proposed service model for the transfer between cryptocurrencies and CBDCs, not to the general IT services.
