Whatsapp Inc.

Google Inc.

George Nachman

Chun Wing Yuen

Ehren Andrew Kret

Eugene Fooksman

Dmitri Stukalov

Zafir Khan

Uzma Hussain Barlaskar

Alexander Shturm

Sergey Petrov

Arnaud Frugier

Attaullah Baig

Derek Alan Konigsberg

Methods, systems, and storage media for generating polls in an end-to-end encrypted messaging platform are disclosed. Exemplary implementations may: initiate, by an initiator, a poll comprising a poll name, an ending time, and response choices; generate a message to a group of users regarding the poll; for each user of the group of users, generate a key pair comprising a chain key and a signature key; receive, from a user of the group of users, a selection comprising at least one of the response choices; and cause display of the selection through the poll.

Enabling polls in an end-to-end encrypted messaging platform

Systems, methods, apparatuses, and computer program products to specify and test open communication protocols. A messaging client executing on a processor of a client device may generate a request stanza based on a first specification file of a plurality of specification files for the messaging client. The messaging client may validate the request stanza based on one or more parameters specified by the first specification file. The messaging client may invoke a response handler for the request stanza. The messaging client may receive a response stanza from a server. The response handler may process the response stanza. The messaging client may display an output of the processing of the response handler.

Specifying and testing open communication protocols

Exemplary embodiments relate to techniques for providing more accurate counts relating to unread messages in a communications system. Conventionally, the unread count for an app may be inaccurate, because the local application does not synchronize its understanding of the unread messages with the server. In the described embodiments, both the server and the application inform each other of what they understand the unread count to be. The client also informs the server of when the local application is backgrounded and foregrounded. With this information, the server is able to update its badge count more accurately, and the local client is able to estimate how far off the server's count is. Using the techniques described herein, the server may inform the client of its badge-count understanding in a way that does not cause the application to wake up on the local device, thereby resulting in less battery consumption.

Methods and systems for determining an unread message count

Techniques for key ratcheting with multiple step sizes are described. For example, an apparatus may be configured to receive two or more encrypted messages, where the encrypted messages are encrypted according to a multi-dimensional ratcheting encryption scheme. Moreover, the apparatus may be configured to determine which of the encrypted messages was most-recently received and extract a message iteration count from the most-recent encrypted message, generate a decrypted message by decrypting the encrypted message based on a decryption key, decompose the message iteration count into a plurality of message chain key iteration counts, and determine the decryption key based on the plurality of message chain key iteration counts.

Techniques for key ratcheting with multiple step sizes

In one aspect, a hand-held device is provided with a display, camera, motion detector and processor. The processor receives a sequence of images from the camera, the relative distance to the object based on the parallax associated with two or more images of the sequence and the motion of the camera is determined, and the image is augmented and displayed based on the relative distances.

Identification of relative distance of objects in images

A messaging server receives a sharing message from a sharer client indicating that the sharer client is offering to provide live location information. When the messaging server receives a subscription request from a receiver client indicating a request to receive live location information shared by the sharer client, the messaging server sends a location request to the sharer client. The location request requests live location information from the sharer client. The sharer client determines its location using a location module and sends live location information to the messaging server in response to the request. The server sends the live location information received from the sharer client to the receiver client. When no receiver clients send subscription requests, the sharer client does not send live location information, thereby preserving power by limiting use of the location module.

Power management for location sharing

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for searching within images. In one aspect, a method includes receiving a query from a user device; receiving a query image from the user device; identifying a result image responsive to the query; determining that an object depicted in a sub-portion of the query image is similar to the result image; and in response to determining that the object depicted in the sub-portion of the query image is similar to the result image: providing annotation data to the user device that causes the user device to display an annotation with the query image, the annotation specifying the sub-portion of the query image that includes the object that is similar to the result image.

Growing community of inventors

Sunnyvale, CA, United States of America

George Nachman