Low-latency media sharing

• US 9,374,559 B1
• Filed: 12/23/2014
• Issued: 06/21/2016
• Est. Priority Date: 12/23/2014
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Beguin, Julien George
• Primary Examiner(s): Hance, Robert
• Application Number:
  US14/580,271
• Time in Patent Office: 546 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04L 9/088 Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms network architectures or network communication protocols for using time-dependent keys in a packet data network H04L63/068
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
• CPC Class Codes: H04L 9/14 using a plurality of keys or algorithms
• CPC Class Codes: H04N 1/00127 Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
• CPC Class Codes: H04N 1/00153 for sharing images with a selected individual or correspondent
• CPC Class Codes: H04N 1/00283 with a television apparatus
• CPC Class Codes: H04N 1/00395 Arrangements for reducing operator input input arrangements for job or mode instructions or parameters H04N1/00962; intelligent menu interfaces H04N1/00437
• CPC Class Codes: H04N 1/00437 Intelligent menus, e.g. anticipating user selections
• CPC Class Codes: H04N 1/32272 Encryption or ciphering
• CPC Class Codes: H04N 1/4486 using digital data encryption
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/26613 for generating or managing keys in general key distribution for secret or secure communication involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] H04L9/083; network support of key management H04L63/06; key management for network security in communication control or processing H04W12/04
• CPC Class Codes: H04N 21/4126 The peripheral being portable, e.g. PDAs or mobile phones
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 12/04 : Key management, e.g. using generic bootstrapping architecture [GBA]

Abstract

Devices, systems and methods are disclosed that encrypt media files with cryptographic keys and transmit the encrypted media files to a remote device during pre-caching. The encrypted media files may be transferred to the remote devices prior to a user issuing a request to share the particular media file. The local device may maintain cryptographic keys associated with the sent encrypted media files and only share a cryptographic key associated with a media file the user wishes to share. Without the cryptographic keys, the remote device cannot access the contents of the pre-shared encrypted media files in the remote device'"'"'s cache. Upon the user sharing the media file and the remote device receiving the cryptographic key, the remote device may use the cryptographic key to decrypt the encrypted media file and display the media file at a significantly reduced latency than if the media file were sent only upon the sharing request.

Claims

1. A computer-implemented method for sharing a file between a local device and a television, the method comprising:

identifying, at a first time, a first image on the local device as a candidate for sharing, the first image selected by a user of the local device;

assigning a first identifier to the first image, the first identifier being a number;

determining a television with which to share the first image, the television having an established relationship with the local device including previously sharing images from the local device to the television;

identifying a tablet device with which to share the first image;

determining that the television has a higher priority than the tablet device based on the established relationship;

encrypting the first image to generate a first encrypted image, the encrypting using a first cryptographic key;

inserting the first identifier in a header associated with the first encrypted image, the header comprising supplemental data placed at a beginning of the first encrypted image;

associating the first cryptographic key with the first identifier;

sending, at a second time, the first encrypted image from the local device to the television, wherein the second time is after the first time;

sending, at a third time, the first encrypted image from the local device to the tablet device, wherein the third time is after the second time;

detecting, at a fourth time, a share request input by a user of the local device, the share request instructing the local device to share the first image with the television, wherein the fourth time is after the second time;

identifying the first identifier associated with the first image;

identifying the first cryptographic key using the first identifier; and

sending the first cryptographic key and the first identifier from the local device to the television.

2. The computer-implemented method of claim 1, wherein the encrypting further comprises:

compressing the first image to generate a compressed first image; and

encrypting the compressed first image to generate an encrypted compressed first image using the first cryptographic key,

wherein the encrypted compressed first image is transmitted prior to the first encrypted image.

3. The computer-implemented method of claim 1, wherein the identifying the television further comprises:

identifying a plurality of first devices within communicable range of the local device using at least one of Bluetooth or WiFi Direct compliant protocols;

identifying, from the plurality of first devices, a plurality of second devices in sharing mode, the sharing mode being a setting on each of the plurality of first devices; and

selecting the television from the plurality of second devices based on the established relationship.

4. A computer-implemented method, comprising:

identifying first data on a first device as a candidate for sharing;

identifying a second device with which to share the first data;

determining a first relationship between the first device and the second device;

identifying a third device with which to share the first data;

determining a second relationship between the first device and the third device;

determining that the third device has a lower priority than the second device based on the first relationship and the second relationship;

generating first encrypted data based at least in part on the first data;

sending the first encrypted data to the second device;

sending the first encrypted data to the third device, wherein the first encrypted data is sent to the third device after the first encrypted data is sent to the second device;

after sending the first encrypted data to the second device, receiving a share request for the first device to share the first data with the second device; and

sending a first cryptographic key to the second device, the first cryptographic key usable for decrypting the first encrypted data.

5. The computer-implemented method of claim 4, wherein the identifying the first data further comprises:

identifying a plurality of files on the first device;

detecting input from a user, the input selecting a first file of the plurality of files;

determining one or more files associated with the first file, the one or more files one of near the first file in a file folder and created within a time range of the first file; and

selecting the first data from the one or more files.

6. The computer-implemented method of claim 4, wherein the identifying the second device further comprises:

identifying a plurality of first devices in proximity to the first device;

identifying, from the plurality of first devices, a plurality of second devices in sharing mode; and

selecting the second device from the plurality of second devices based on the first relationship between the first device and the second device, the first relationship including current and previous interactions between the first device and the second device.

7. The computer-implemented method of claim 4, further comprising:

identifying second data on the first device as candidate data for potential sharing;

generating second encrypted data based at least in part on the second data;

sending the second encrypted data to the second device;

determining that the second data is unlikely to be shared with the second device; and

sending a signal to the second device to delete the second encrypted data.

8. The computer-implemented method of claim 4, wherein the detecting the share request further comprises:

detecting a select command from an input component, the select command selecting the first data on the first device;

determining the first data as a candidate for sharing;

determining a swiping motion occurred on the input component, the swiping motion associated with pixels used to display information associated with the first data and associated with the second device; and

determining the second device as a device with which to share the first data.

9. The computer-implemented method of claim 4, further comprising:

storing the first cryptographic key on the first device, the first cryptographic key associated with a timestamp;

identifying the first cryptographic key based on the share request;

determining that the first cryptographic key is past an expiration time threshold, the expiration time threshold being a determined time period after the timestamp; and

removing the first cryptographic key from the first device.

10. The computer-implemented method of claim 4, wherein the encrypting further comprises:

compressing the first data to generate compressed first data; and

encrypting the compressed first data to generate encrypted compressed first data using the first cryptographic key,

wherein the encrypted compressed first data is transmitted prior to the first encrypted data.

11. The computer-implemented method of claim 10, wherein the first cryptographic key is usable for decrypting the first encrypted data and the encrypted compressed first data.

12. The computer-implemented method of claim 4, wherein determining the first relationship between the first device and the second device comprises at least one of:

determining a distance between the first device and the second device;

determining that the first device and the second device are associated with a wireless network;

determining current interactions between the first device and the second device;

determining previous interactions between the first device and the second device; and

determining an association between the first device and the second device, wherein the association indicates that;

the first device is associated with a first account, and

the second device is associated with one of the first account or a second account that previously interacted with the first account.

13. A first computing device, comprising:

at least one processor;

a memory device including instructions operable to be executed by the at least one processor to cause the device to;

identify first data on the first device as a candidate for sharing;

identify a second device with which to share the first data;

generate first encrypted data based at least in part on the first data;

send the first encrypted data to the second device;

determine that the first data is unlikely to be shared with the second device; and

send a signal to the second device to delete the first encrypted data.

14. The device of claim 13, wherein the instructions further configure the system to:

identify a plurality of files on the first device;

detect input from a user, the input selecting a first file of the plurality of files;

determine one or more files associated with the first file, the one or more files one of near the first file in a file folder and created within a time range of the first file; and

select the first data from the one or more files.

15. The device of claim 13, wherein the instructions further configure the system to:

identify a plurality of first devices in proximity to the first device;

identify, from the plurality of first devices, a plurality of second devices in sharing mode; and

select the second device from the plurality of second devices based on an established relationship between the first device and the second device, the established relationship including current and previous interactions between the first device and the second device.

16. The device of claim 15, wherein the instructions further configure the system to:

identify a third device from the plurality of second devices, the third device not having an established relationship with the first device;

determine that the third device has a lower priority than the second device; and

send the first encrypted data from the first device to the third device, wherein the first encrypted data is sent to the third device after the first encrypted data is sent to the second device.

17. The device of claim 13, wherein the instructions further configure the system to:

detect a select command from an input component, the select command selecting the first data on the first device;

determine the first data as a candidate for sharing;

determine a swiping motion occurred on the input component, the swiping motion associated with pixels used to display information associated with the first data and associated with the second device; and

determine the second device as a device with which to share the first data.

18. The device of claim 13, wherein the instructions further configure the system to:

store the first cryptographic key on the first device, the first cryptographic key associated with a timestamp;

identify the first cryptographic key based on the share request;

determine that the first cryptographic key is past an expiration time threshold, the expiration time threshold being a determined time period after the timestamp; and

remove the first cryptographic key from the first device.

19. The device of claim 13, wherein the instructions further configure the system to:

compress the first data to generate compressed first data; and

encrypt the compressed first data to generate encrypted compressed first data using the first cryptographic key,

wherein the encrypted compressed first data is transmitted prior to the first encrypted data.

20. The device of claim 19, wherein the first cryptographic key is usable for decrypting the first encrypted data and the encrypted compressed first data.