MEDICAL DEVICE WITH CRYPTOSYSTEM AND METHOD OF IMPLEMENTING THE SAME

• US 20160117449A1
• Filed: 10/28/2015
• Published: 04/28/2016
• Est. Priority Date: 10/28/2014
• Status: Active Grant

• Current Assignee: Stryker Sustainability Solutions, Inc. (Stryker Corporation)
• Original Assignee: Stryker Sustainability Solutions, Inc. (Stryker Corporation)
• Inventors: Hunn, David Robert Joseph
• Granted Patent: US 10,089,439 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: G06F 21/62 Protecting access to data via a platform, e.g. using keys or access control rules
• CPC Class Codes: G06F 21/64 Protecting data integrity, e.g. using checksums, certificates or signatures
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: H04L 63/068 using time-dependent keys, e.g. periodically changing keys cryptographic mechanisms or cryptographic arrangements for controlling usage of secret information H04L9/088

Abstract

A medical device and a method of implementing a cryptosystem on the medical device include storing a data structure on a memory component of the medical device. An encryption key is stored in the data structure. Usage data related to usage of the medical device is provided. The encryption key is read from the data structure. The usage data is encrypted with the read encryption key. The encryption key is eliminated such that the encryption key is no longer present in the medical device.

Claims

1. A medical device configured to connect to a console, said medical device comprising:

a handpiece;

a memory component positioned in said handpiece;

a data structure stored on said memory component; and

a plurality of encryption keys being stored in said data structure.

2. The medical device of claim 1 further comprising encrypted usage data related to usage of said medical device being stored in said data structure.

3. The medical device of claim 2 wherein said encrypted usage data is encrypted by one of said encryption keys that was previously stored in said data structure and subsequently eliminated such that said encryption key is no longer present in said medical device.

4. The medical device of claim 1 wherein said data structure includes a plurality of data segments.

5. The medical device of claim 4 wherein each one of said encryption keys is stored a different one of said data segments.

6. The medical device of claim 4 wherein said data segments are contiguously arranged in said data structure.

7. The medical device of claim 5 further including a plurality of decryption keys with each one of said decryption keys being associated with one of said encryption keys.

8. The medical device of claim 7 wherein each of said decryption keys is stored in the same data segment as said associated encryption key.

9. The medical device of claim 7 wherein one of said plurality of data segments includes identification data related to the medical device.

10. The medical device of claim 9 wherein said plurality of decryption keys and said identification data are encrypted.

11. A method for manipulating a data structure provided on a memory component of a medical device, the data structure including an encryption key, said method comprising:

providing usage data related to usage of the medical device;

reading the encryption key from the data structure;

encrypting the usage data with the read encryption key;

storing the encrypted usage data on the data structure; and

eliminating the encryption key from the data structure such that said encryption key is no longer present in the medical device.

12. The method of claim 11 further including decrypting the encrypted usage data with a decryption key that is associated with the encryption key.

13. The method of claim 12 further including encrypting the decryption key with a master encryption key.

14. The method of claim 13 further including decrypting the decryption key with a master decryption key that is associated with the master encryption key.

15. A method of managing the ability of a console to modify authentic usage data on a memory component of a medical device, the memory component including a data structure with an encryption key, said method comprising:

reading the encryption key from the data structure with the console;

encrypting the usage data with the encryption key such that the usage data remains authentic;

writing the encrypted usage data to the data structure with the console; and

eliminating the encryption key from the data structure such that the console is no longer able to read the encryption key from the medical device, thereby preventing the console from modifying the authentic usage data.

16. The method of claim 15, wherein the data structure further includes a decryption key that is associated with the encryption key for providing the ability to read the authentic usage data, said method including reading the decryption key from the data structure with the console and decrypting the encrypted usage data.

17. The method of claim 16, wherein the memory component further includes identification data related to the medical device, said method further including protecting the decryption key and identification data using asymmetric key encryption utilizing a secret key and a public key.

18. The method of claim 17, further including providing one console access to the secret key and providing another console access to the public key.

19. The method of claim 16, further including protecting the encryption key and the authentic usage data using asymmetric key encryption utilizing a secret key and a public key.

20. The method of claim 19, further including providing one console access to the secret key and providing another console access to the public key.