SELF-VALIDATING REQUEST MESSAGE STRUCTURE AND OPERATION

• US 20150318995A1
• Filed: 03/03/2015
• Published: 11/05/2015
• Est. Priority Date: 04/30/2014
• Status: Active Grant

• Current Assignee: Pure Storage, Inc.
• Original Assignee: Cleversafe Incorporated (International Business Machines Corporation)
• Inventors: Leggette, Wesley, Resch, Jason K.
• Granted Patent: US 9,735,967 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/07 Responding to the occurrence of a fault, e.g. fault tolerance
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; 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], H04L67/1097
• CPC Class Codes: G06F 11/0754 by exceeding limits
• CPC Class Codes: G06F 11/076 by exceeding a count or rate limit, e.g. word- or bit count limit
• CPC Class Codes: G06F 11/2058 using more than 2 mirrored copies
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 2211/1004 Adaptive RAID, i.e. RAID system adapts to changing circumstances, e.g. RAID1 becomes RAID5 as disks fill up
• CPC Class Codes: G06F 3/06 Digital input from, or digital output to, record carriers , e.g. RAID, emulated record carriers or networked record carriers
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0685 Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays
• CPC Class Codes: H04L 63/0435 wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption cryptographic mechanisms or cryptographic arrangements for symmetric key encryption H04L9/06
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 9/0822 using key encryption key
• CPC Class Codes: H04L 9/14 using a plurality of keys or algorithms
• CPC Class Codes: H04L 9/3242 involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC

Abstract

A method begins by a first device generating a self-validating message by creating a master key, using the master key to create a message encryption key, encrypting a message using the message encryption key to produce an encrypted message, encrypting the master key using a public key of a second device to produce an encrypted master key, and including a message authentication code of the first device in the self-validating message. The method continues by the second device receiving and decoding the self-validating message by verifying the message authentication code of the first device, and when the message authentication code of the first device is verified, decrypting the encrypted master key using a private key of the second device to recover the master key, using the master key to create the message encryption key, and decrypting the encrypted message using the message encryption key to recover the message.

Claims

1. A method comprises:

generating, by a first device, a self-validating message by;

creating a master key;

using the master key and a secret function to create a message encryption key;

encrypting a message using the message encryption key to produce an encrypted message;

encrypting the master key using a public key of a second device to produce an encrypted master key; and

including a message authentication code of the first device in the self-validating message;

receiving, by a second device, the self-validating message; and

decoding, by the second device, the self-validating message by;

verifying the message authentication code of the first device; and

when the message authentication code of the first device is verified;

decrypting the encrypted master key using a private key of the second device to recover the master key;

using the master key and the secret function to create the message encryption key; and

decrypting the encrypted message using the message encryption key to recover the message.

2. The method of claim 1 further comprises:

creating, by the first device, the message authentication code based on the master key and a second secret function; and

verifying, by the second device, the message authentication code based on the master key and the second secret function.

3. The method of claim 1, wherein the self-validating message comprises:

a header section that includes the encrypted master key and one or more of;

a time stamp, a first device identifier, a certificate chain, and a header signature;

the encrypted message; and

the message authentication code.

4. The method of claim 1 further comprises:

encrypting, as the message, a read request using the message encryption key to produce the encrypted message;

decrypting, by the second device, the encrypted message to recover the read request;

generating, by the second device, a read response corresponding to the read request;

creating, by the second device, a responder encryption key from the master key and a second secret function;

encrypting, by the second device, the read response using the responder encryption key to produce an encrypted read response;

receiving, by the first device, the encrypted read response;

creating, by the first device, the responder encryption key from the master key and the second secret function; and

decrypting, by the first device, the encrypted read response based on the responder encryption key to recover the read response.

5. The method of claim 1 further comprises:

encrypting, as the message, a write request using the message encryption key to produce the encrypted message;

decrypting, by the second device, the encrypted message to recover the write request;

executing, by the second device, the write request;

generating, by the second device, a write response corresponding to the executing of the write request;

creating, by the second device, a responder encryption key from the master key and a second secret function;

encrypting, by the second device, the write response using the responder encryption key to produce an encrypted write response;

receiving, by the first device, the encrypted write response;

creating, by the first device, the responder encryption key from the master key and the second secret function;

decrypting, by the first device, the encrypted write response based on the responder encryption key to recover the write response;

generating, by the first device, a second message encryption key from the master key and a third secret function;

encrypting, by the first device, a write commit message using the second message encryption key to produce an encrypted write commit message;

receiving, by the second device, the encrypted write commit message;

creating, by the second device, the second message encryption key from the master key and the third secret function; and

decrypting, by the second device, the encrypted write commit message based on the second message encryption key to recover the write commit message.

6. The method of claim 1 further comprises:

creating, by the second device, a self-validating response message by;

creating a responder encryption key from the master key and a second secret function;

encrypting a response to the message using the responder encryption key to produce an encrypted response; and

including a second message authentication code of the second device in the self-validating response message; and

sending, by the second device, the self-validating response message to the first device.

7. The method of claim 6 further comprises:

creating, by the second device, the second message authentication code based on the master key and a third secret function;

verifying, by the first device, the second message authentication code based on the master key and the third secret function;

when the second message authentication code is verified;

creating, by the first device, the responder encryption key from the master key and the second secret function; and

decrypting the encrypted response using the responder encryption key to recover the response.

8. A computer readable storage medium comprises:

at least one memory section that stores operational instructions that, when executed by one or more processing modules of one or more devices of a dispersed storage network (DSN), causes the one or more devices to;

generate, by a first device of the one or more devices, a self-validating message by;

creating a master key;

using the master key and a secret function to create a message encryption key;

encrypting a message using the message encryption key to produce an encrypted message;

encrypting the master key using a public key of a second device to produce an encrypted master key; and

including a message authentication code of the first device in the self-validating message;

receive, by a second device of the one or more devices, the self-validating message; and

decode, by the second device, the self-validating message by;

verifying the message authentication code of the first device; and

when the message authentication code of the first device is verified;

decrypting the encrypted master key using a private key of the second device to recover the master key;

using the master key and the secret function to create the message encryption key; and

decrypting the encrypted message using the message encryption key to recover the message.

9. The computer readable storage medium of claim 8 further comprises:

the at least one memory section stores further operational instructions that, when executed by the one or more processing modules, causes the one or more devices of the DSN to;

create, by the first device, the message authentication code based on the master key and a second secret function; and

verify, by the second device, the message authentication code based on the master key and the second secret function.

10. The computer readable storage medium of claim 8, wherein the self-validating message comprises:

a header section that includes the encrypted master key and one or more of;

a time stamp, a first device identifier, a certificate chain, and a header signature;

the encrypted message; and

the message authentication code.

11. The computer readable storage medium of claim 8 further comprises:

the at least one memory section stores further operational instructions that, when executed by the one or more processing modules, causes the one or more devices of the DSN to;

encrypt, as the message, a read request using the message encryption key to produce the encrypted message;

decrypt, by the second device, the encrypted message to recover the read request;

generate, by the second device, a read response corresponding to the read request;

create, by the second device, a responder encryption key from the master key and a second secret function;

encrypt, by the second device, the read response using the responder encryption key to produce an encrypted read response;

receive, by the first device, the encrypted read response;

create, by the first device, the responder encryption key from the master key and the second secret function; and

decrypt, by the first device, the encrypted read response based on the responder encryption key to recover the read response.

12. The computer readable storage medium of claim 8 further comprises:

the at least one memory section stores further operational instructions that, when executed by the one or more processing modules, causes the one or more devices of the DSN to;

encrypt, as the message, a write request using the message encryption key to produce the encrypted message;

decrypt, by the second device, the encrypted message to recover the write request;

execute, by the second device, the write request;

generate, by the second device, a write response corresponding to the executing of the write request;

create, by the second device, a responder encryption key from the master key and a second secret function;

encrypt, by the second device, the write response using the responder encryption key to produce an encrypted write response;

receive, by the first device, the encrypted write response;

create, by the first device, the responder encryption key from the master key and the second secret function;

decrypt, by the first device, the encrypted write response based on the responder encryption key to recover the write response;

generate, by the first device, a second message encryption key from the master key and a third secret function;

encrypt, by the first device, a write commit message using the second message encryption key to produce an encrypted write commit message;

receive, by the second device, the encrypted write commit message;

create, by the second device, the second message encryption key from the master key and the third secret function; and

decrypt, by the second device, the encrypted write commit message based on the second message encryption key to recover the write commit message.

13. The computer readable storage medium of claim 8 further comprises:

the at least one memory section stores further operational instructions that, when executed by the one or more processing modules, causes the one or more devices of the DSN to;

create, by the second device, a self-validating response message by;

creating a responder encryption key from the master key and a second secret function;

encrypting a response to the message using the responder encryption key to produce an encrypted response; and

including a second message authentication code of the second device in the self-validating response message; and

send, by the second device, the self-validating response message to the first device.

14. The computer readable storage medium of claim 13 further comprises:

the at least one memory section stores further operational instructions that, when executed by the one or more processing modules, causes the one or more devices of the DSN to;

create, by the second device, the second message authentication code based on the master key and a third secret function;

verify, by the first device, the second message authentication code based on the master key and the third secret function;

when the second message authentication code is verified;

create, by the first device, the responder encryption key from the master key and the second secret function; and

decrypt the encrypted response using the responder encryption key to recover the response.