NTT docomo business has launched a cloud storage service called “Sekihi STORAGE” that uses secret sharing technology to store data in three geographically separated locations.
This service supports BCP measures and the protection of sensitive data in various fields, including medicine.
Since data is stored in three locations using secret sharing technology, there is a high level of confidentiality, meaning that even if data is leaked at one location, it cannot be restored to its original state. In addition, even if a severe disaster occurs at one location and the entire data center becomes unusable, the service can continue to be provided and data can be restored from the remaining two locations, providing high availability.
There are two types of storage: a standard model suitable for online processing and an archive model suitable for backup. Available implementation methods are a full cloud method (all three distributed storage environments provided by the service) which requires no operational work and avoids troublesome system operation, and a hybrid method which partially utilizes the user’s environment (two distributed storage environments provided by the service and one environment provided by the user).
General cloud storage services charge for data storage capacity as well as for data transfer, but with this service the fee is determined only by storage size, and there is no charge for data transfer.

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