Secure network data storage mediator

• US 20040143733A1
• Filed: 01/16/2003
• Published: 07/22/2004
• Est. Priority Date: 01/16/2003
• Status: Abandoned Application

• Current Assignee: Cloverleaf Communications
• Original Assignee: Cloverleaf Communications
• Inventors: Ophir, Sefy, Yavor, Elic
• Application Number:
  US10/345,348
• Publication Number:
  US 20040143733A1
• Time in Patent Office: Days
• US Class Current: 713/153
• CPC Class Codes: H04L 63/0471 applying encryption by an intermediary, e.g. receiving clear information at the intermediary and encrypting the received information at the intermediary before forwarding
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A mediator for the protection of data in storage devices over a network. The mediator connects over the network to one or more data clients and to one or more data storage devices, and provides secure storage of data for the data clients on the data storage devices. The mediator functions as a central point for the encryption of data from the data clients to be stored on the storage devices, as well as decryption of the encrypted data retrieved from the storage devices for delivery to the data clients. The mediator can handle multiple protocols, such as IP protocols, file service protocols, and block device protocols; multiple storage technologies such as Fiber Channel and Ethernet; and multiple services such as block, file, and database services. The mediator can also perform various fictions such as protocol translation. The mediator benefits from the fact that all storage devices, as well as data clients, are connected over a network, thereby allowing flexibility, expandability, and scalability of configurations without the limitations imposed by local interconnectivity. At the same time, however, the mediator provides secure virtual storage to data clients without requiting them to be involved in any of the encryption or decryption operations. In particular, data clients are not burdened with compulsory management of any keys used in the protection of stored data. As a result, the encryption/decryption of stored data can be optimized for security without concerns for key distribution.

Claims

1. A mediator for the storage and protection of data over a network, the mediator comprising:

(a) an incoming network interface operative to connecting to a sending data client over an incoming network, and operative to receiving data from said sending data client;

(b) an encryption unit for encrypting said data received from said sending data client;

(c) a storage network interface operative to connecting to a data storage device over a storage network, for storing data in said data storage device after encryption by said encryption unit;

(d) a retrieval network interface operative to connecting to said data storage device over a retrieval network, for retrieving data from said data storage device;

(e) a decryption unit for decrypting said data retrieved from said data storage device; and

(f) an outgoing network interface operative to connecting to a receiving data client over an outgoing network, and operative to sending data to said receiving data client after decryption by said decryption unit.

2. The mediator of claim 1, wherein said encryption unit is operative to:

i) obtaining an encryption key from a source other than said sending data client; and

ii) encrypting said data received from said sending data client, using said encryption key.

3. The mediator of claim 2, wherein said encryption unit is further operative to;

iii) using a master key to encrypt said encryption key.

4. The mediator of claim 1, wherein said decryption unit is operative to:

i) obtaining a decryption key from a source other than said receiving data client; and

ii) decrypting said data retrieved from said data storage device, using said decryption key.

5. The mediator of claim 4, wherein said decryption unit is further operative to:

iii) using a master key to decrypt said decryption key.

6. The mediator of claim 1, wherein said sending data client is the same as said receiving data client.

7. The mediator of claim 1, wherein at least two of said incoming network interface, said storage network interface, said retrieval network interface, and said outgoing network interface are the same.

8. The mediator of claim 1, wherein at least two of said incoming network, said storage network, said retrieval network, and said outgoing network are the same.

9. The mediator of claim 1, wherein said encryption unit and said decryption unit are the same.

10. The mediator of claim 1, wherein at least one of said networks includes a plurality of different network interface technologies.

11. The mediator of claim 1, wherein at least one of said network interfaces includes a technology selected from a group including Gigabit Ethernet, TCP/IP, and Fiber Channel.

12. The mediator of claim 1, further comprising a protocol translator for bridging between networks utilizing different protocols.

13. The mediator of claim 1, wherein said at least one data client includes a client protocol, wherein said at least one at least one data storage device includes a device protocol, and wherein the mediator is operative to providing protocol translation between said client protocol and said device protocol.

14. The mediator of claim 1, operative to providing services selected from a group including:

block services, file services, and database services.

15. The mediator of claim 14, operative to providing file services and encryption of file data only.

16. A configuration for secure data storage, the configuration comprising:

(a) a set of networks containing at least one network;

(b) a sending data client connected to an incoming network included in said set of networks;

(c) a receiving data client connected to an outgoing network included in said set of networks

(d) a storage network included in said set of networks and connecting to a data storage device;

(e) a retrieval network included in said set of networks and connecting to said data storage device; and

(f) a mediator connected to said incoming network, to said storage network, to said retrieval network, and to said outgoing network, wherein said mediator is operative to;

i) receiving, over said incoming network, data from said sending data client;

ii) obtaining an encryption key from a source other than said sending data client;

iii) encrypting said data received from said sending data client into encrypted data, using said encryption key;

iv) sending, over said storage network, said encrypted data to said data storage device for storage therein;

v) receiving, over said retrieval network, encrypted data retrieved from said data storage device;

vi) obtaining a decryption key from a source other than said receiving data client;

vii) decrypting said encrypt data retrieved from said data storage device into decrypted data, using said decryption key; and

viii) sending, over said outgoing network, said decrypted data to said receiving data client.

17. The configuration of claim 16, wherein said sending data client is the same as said receiving data client.

18. The configuration of claim 16, wherein at least two of said incoming network, said storage network, said retrieval network, and said outgoing network are the same.

19. The configuration of claim 16, wherein said encryption unit and said decryption unit are the same.

20. The configuration of claim 16, wherein said mediator is further operative to:

ix) a master key to encrypt said encryption key; and

x) using a master key to decrypt said decryption key.