Table 1: Accountability roles in practice.

Identity Role Responsibility Outcome Alice Trade requestor Enter code and bid price. Provide funds for purchase. The request accepted by Entity B. Entity B Trade provider Display result page with data from Entity C and D. Execute trade requested. Pay Entity C and D fees due. The trade is executed. Fund transferred from Alice’s account. Entity C Charting service provider Provide correct charted pricing indicators. Chart is displayed and the fee is received from Entity B. Entity D Real-time price provider Provide real-time pricing with integrity. Data feed is provided and receive fee from B.