Multi party messaging

Patent metadata

Field	Value
Publication number	US-9628449-B1
Application number	US-201514677258-A
Country	US
Kind code	B1
Filing date	Apr 2, 2015
Priority date	Jul 16, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

Multi-party messaging is disclosed. A plurality of public keys is requested by a first device from a server, wherein the plurality of public keys is associated with a plurality of recipients. A message containing one or more components is encrypted using a symmetric key. The symmetric key is encrypted, using each of the respective public keys, resulting in a plurality of encrypted symmetric keys. The encrypted message and the encrypted symmetric keys are encapsulated in an encapsulation. The encapsulation is transmitted to the server.

First claim

What is claimed is:

1. A system, comprising:
a set of one or more interfaces configured to:
receive, from a first device, a request for a plurality of public keys associated with a plurality of shared recipients of a first message, wherein a first recipient included in the plurality of shared recipients is associated with a second device and wherein a second recipient included in the plurality of shared recipients is associated with a third device;
transmit, to the first device, a set of public keys associated with at least some of the shared recipients; and
receive, from the first device, an encapsulation containing the first message in an encrypted form and containing a plurality of encrypted symmetric keys, wherein the encapsulation is performed, at least in part, using a spreading function;

a set of one or more processors configured to:
create, in response to the receipt from the first device of the encapsulation, a record associated with the received encapsulation, wherein the record includes, for a given respective recipient, an indication of whether the respective recipient has requested the received encapsulation; and
in response to receipt, from the second device, of a request to access the first message, update the record associated with the received encapsulation to indicate that the second device has requested to access the first message;
track receipt, by all message recipients, of the first message; and
in response to a determination that all message recipients have received the first message, delete the encapsulation from a storage associated with the system; and

a memory coupled to at least one processor included in the set of one or more processors and configured to provide the at least one processor with instructions.

2. The system of claim 1 wherein the set of one or more interfaces is further configured to transmit to the second device a notification associated with the arrival of the first message at the system.

3. The system of claim 1 wherein the set of one or more processors is configured to determine whether or not to transmit to the second device a notification associated with the arrival of the first message of the system by determining whether the first recipient has opted to receive message notifications on the second device.

4. The system of claim 1 wherein the set of one or more processors is further configured to determine that a deadline for accessing the first message has passed and cause deletion of the encapsulation from a storage associated with the system in response to the determination.

5. The system of claim 1 wherein the set of one or more processors is further configured to cause a transmission to the first device of at least one respective device identifier associated with each of the respective recipients.

6. The system of claim 1 wherein the set of one or more processors is further configured to cause a transmission to the first device of at least one respective application identifier associated with each of the respective recipients.

7. The system of claim 1 wherein the encapsulation further includes a public key associated with the first device.

8. The system of claim 1 wherein the encapsulation further includes a device identifier associated with the first device.

9. The system of claim 1 wherein at least one recipient included in the plurality of recipients is associated with a single public key and a plurality of device identifiers.

10. A method, comprising:
receiving, from a first device, a request for a plurality of public keys associated with a plurality of shared recipients of a first message, wherein a first recipient included in the plurality of shared recipients is associated with a second device and wherein a second recipient included in the plurality of shared recipients is associated with a third device;
transmitting, to the first device, a set of public keys associated with at least some of the shared recipients;
receiving, from the first device, an encapsulation containing the first message in an encrypted form and containing a plurality of encrypted symmetric keys, wherein the encapsulation is performed, at least in part, using a spreading function;
creating, in response to the receipt from the first device of the encapsulation, a record associated with the received encapsulation, wherein the record includes, for a given respective recipient, an indication of whether the respective recipient has requested the received encapsulation;
in response to receipt, from the second device, of a request to access the first message, updating the record associated with the received encapsulation to indicate that the second device has requested to access the first message;
tracking receipt, by all message recipients, of the first message; and
in response to a determination that all message recipients have received the first message, deleting the encapsulation from a storage associated with the system.

11. The method of claim 10 further comprising transmitting to the second device a notification associated with the receipt of the first message.

12. The method of claim 10 further comprising determining whether or not to transmit to the second device a notification associated with the receipt of the first message by determining whether the first recipient has opted to receive message notifications on the second device.

13. The method of claim 10 further comprising determining that a deadline for accessing the first message has passed and causing deletion of the encapsulation in response to the determination.

14. The method of claim 10 further comprising causing the transmission to the first device of at least one respective device identifier associated with each of the respective recipients.

15. The method of claim 10 further comprising causing the transmission to the first device of at least one respective application identifier associated with each of the respective recipients.

16. The method of claim 10 wherein the encapsulation further includes a public key associated with the first device.

17. The method of claim 10 wherein the encapsulation further includes a device identifier associated with the first device.

18. The method of claim 10 wherein at least one recipient included in the plurality of recipients is associated with a single public key and a plurality of device identifiers.

19. A computer program product embodied in a non-transitory tangible computer readable storage medium and comprising computer instructions for:
receiving, from a first device, a request for a plurality of public keys associated with a plurality of shared recipients of a first message, wherein a first recipient included in the plurality of shared recipients is associated with a second device and wherein a second recipient included in the plurality of shared recipients is associated with a third device;
transmitting, to the first device, a set of public keys associated with at least some of the shared recipients;
receiving, from the first device, an encapsulation containing the first message in an encrypted form and containing a plurality of encrypted symmetric keys, wherein the encapsulation is performed, at least in part, using a spreading function;
creating, in response to the receipt from the first device of the encapsulation, a record associated with the received encapsulation, wherein the record includes, for a given respective recipient, an indication of whether the respective recipient has requested the received encapsulation;
in response to receipt, from the second d

Assignees

• Wickr Inc

Inventors

• Statica Robert

Classifications

• G06F21/84

  output devices, e.g. displays or monitors · CPC title

• G06F2203/04808

  Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen · CPC title

• G06F3/04886

  by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus · CPC title

• G06F3/0481

  based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance · CPC title

• H04L9/0825

  using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates · CPC title