
Dependability
The SIT has security mechanisms that provide
the Participants with guarantees that their exchanges are carried out
under normal confidentiality and integrity conditions:
• Technical security with redundant physical means
(hardware and telecommunications lines).
• Functional security by means of hot backups of the issuing and
receiving functions.
• Banking security that includes the stopgap measures in the Backup
Plan.
• Financial security through monitoring of the exchanged capital amounts.
• Accreditation mechanisms that, for their part, serve to guard against
possible intrusions.
In addition, accreditation mechanisms serve to warn against possible
intrusions.
Moreover, the SIT’s operation has enjoyed overall availability for
several years. Very close to 100% for all functions (network,
accounting centre and
access points) despite
significant software developments (switch to the euro, integration of
the
truncated cheques) and a strong
increase in processed volumes.
To attain this result, the GSIT constantly provides monitoring of the
network and of the
common centres. The operational
continuity is the simultaneous result of not only a strict quality
policy, but also of the existence of reliable and tested backup
procedures, and the careful distribution of the operational centres on
distinct geographical sites. Several
contingency
plans are intended to overcome the
consequences of the total and lasting blockage of a Direct Participant
or a blockage of the SIT systems or teletransmission network. The
objective of these mechanisms is to ensure that the
participants will be able to
carry out their exchanges under all circumstances, and that their
operations will be routed, even in case of problems, to the receiving
participants.
The GSIT has implemented bank piloting tools in order to strengthen
the system’s reliability and security. As such, the ORB (Bank Risk
Observatory) monitors the issued and received amounts, while pointing
out any unusual behaviour and anomalies.