公开(公告)号：US10599873B2

公开(公告)日：2020-03-24

申请号：US15707847

申请日：2017-09-18

Applicant: Apple Inc.

Inventor： Lucas O. Winstrom ,  Eric D. Friedman ,  Ritwik K. Kumar ,  Jeremy M. Stober ,  Amol V. Pattekar ,  Benoit Chevallier-Mames ,  Julien Lerouge ,  Gianpaolo Fasoli ,  Augustin J. Farrugia ,  Mathieu Ciet

IPC: H04L29/06 ,  G06F21/64 ,  G06Q10/10 ,  H04L12/58 ,  H04L9/32 ,  G06F21/55

Abstract: Systems and methods are described for rate-limiting a message-sending client interacting with a message service based on dynamically calculated risk assessments of the probability that the client is, or is not, a sender of a spam messages. The message service sends a proof of work problem to a sending client device with a difficulty level that is related to a risk assessment that the client is a sender of spam messages. The message system limits the rate at which a known or suspected spammer can send messages by giving the known or suspected spammer client harder proof of work problems to solve, while minimizing the burden on normal users of the message system by given them easier proof of work problems to solve that can typically be solved by the client within the time that it takes to type a message.

公开(公告)号：US11790119B2

公开(公告)日：2023-10-17

申请号：US16683233

申请日：2019-11-13

Applicant: Apple Inc.

Inventor： Hervé Sibert ,  Eric D. Friedman ,  Erik C. Neuenschwander ,  Jerrold V. Hauck ,  Thomas P. Mensch ,  Julien F. Freudiger ,  Alan W. Yu

IPC: G06F21/64 ,  H04L9/14 ,  H04L9/32

CPC classification number: G06F21/64 ,  H04L9/14 ,  H04L9/3236 ,  H04L9/3263 ,  H04L9/3271

Abstract: Techniques are disclosed relating to application verification. In various embodiments, a computing device includes a secure circuit configured to maintain a plurality of cryptographic keys of the computing device. In such an embodiment, the computing device receives, from an application, a request for an attestation usable to confirm an integrity of the application, instructs the secure circuit to use one of the plurality of cryptographic keys to supply the attestation for the application, and provides the attestation to a remote computing system in communication with the application. In some embodiments, the secure circuit is configured to verify received metadata pertaining to the identity of the application and use the cryptographic key to generate the attestation indicative of the identity of the application.

公开(公告)号：US11722450B2

公开(公告)日：2023-08-08

申请号：US17702668

申请日：2022-03-23

Applicant: Apple Inc.

Inventor： Eric D. Friedman ,  Ritwik K. Kumar ,  Lucas O. Winstrom

IPC: H04L51/23 ,  G06F16/35 ,  G06F21/62 ,  G06F40/289 ,  H04L51/212 ,  G06Q10/107

CPC classification number: H04L51/23 ,  G06F16/35 ,  G06F21/6254 ,  G06F40/289 ,  H04L51/212 ,  G06Q10/107

Abstract: Systems and methods are disclosed for determining whether a message received by a client may be spam, in a computing environment that preserves privacy. The message may be encrypted. A client invokes the methods when a message is received from a sender that is not known to the client. A client can decrypt the message, break the message into chunks, and apply a differentially private algorithm to the set of chunks. The client transmits the differentially private message sketches to an aggregation server. The aggregation server receives a large collection of such message sketches for a large plurality of clients. The aggregation server returns aggregated message chunk (e.g. frequency) information to the client to assist the client in determining whether the message may be spam. The client can process the message based on the determination without disclosing the message content to the server.

公开(公告)号：US10778633B2

公开(公告)日：2020-09-15

申请号：US15710736

申请日：2017-09-20

Applicant: Apple Inc.

Inventor： Eric D. Friedman ,  Ritwik K. Kumar ,  Lucas Winstrom

IPC: H04L12/58 ,  G06F16/35 ,  G06F21/62 ,  G06F40/289 ,  G06Q10/10

Abstract: Systems and methods are disclosed for determining whether a message received by a client may be spam, in a computing environment that preserves privacy. The message may be encrypted. A client invokes the methods when a message is received from a sender that is not known to the client. A client can decrypt the message, break the message into chunks, and apply a differentially private algorithm to the set of chunks. The client transmits the differentially private message sketches to an aggregation server. The aggregation server receives a large collection of such message sketches for a large plurality of clients. The aggregation server returns aggregated message chunk (e.g. frequency) information to the client to assist the client in determining whether the message may be spam. The client can process the message based on the determination without disclosing the message content to the server.

公开(公告)号：US20180091466A1

公开(公告)日：2018-03-29

申请号：US15710736

申请日：2017-09-20

Applicant: Apple Inc.

Inventor： Eric D. Friedman ,  Ritwik K. Kumar ,  Lucas Winstrom

IPC: H04L12/58 ,  G06F17/27

Abstract: Systems and methods are disclosed for determining whether a message received by a client may be spam, in a computing environment that preserves privacy. The message may be encrypted. A client invokes the methods when a message is received from a sender that is not known to the client. A client can decrypt the message, break the message into chunks, and apply a differentially private algorithm to the set of chunks. The client transmits the differentially private message sketches to an aggregation server. The aggregation server receives a large collection of such message sketches for a large plurality of clients. The aggregation server returns aggregated message chunk (e.g. frequency) information to the client to assist the client in determining whether the message may be spam. The client can process the message based on the determination without disclosing the message content to the server.