Towards practical homomorphic email filtering

Bian, Song; Hiromoto, Masayuki; Satō, Takashi

doi:10.1145/3287624.3287699

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…AI/ML via general crypto or MPC [34,76,155,198,284,315,323,370,383] (total: 9) AI/ML or matching fully clientside [4,86,128,138,207,214,352,366,377] (total: 9) Metadata-based [58,176,262,368,384] (total: 5) Other [269,329,351] (total: 3)…”

Section: Spam Filteringmentioning

confidence: 99%

“…This detection approach was overwhelmingly used in TLS middleboxes implementing deep packet inspection via searchable encryption or trusted hardware; see Appendix B for details. Less frequently, this approach was also used for other use cases, including text filtering [269], and detection of spam [34,383], malware and phishing [177,374], and hate speech [305,384].…”

Section: Rules and Patternsmentioning

confidence: 99%

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SoK: Content Moderation for End-to-End Encryption

Scheffler

Mayer

2023

PoPETs

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Popular messaging applications now enable end-to-end-encryption (E2EE) by default, and E2EE data storage is becoming common. These important advances for security and privacy create new content moderation challenges for online services, because services can no longer directly access plaintext content. While ongoing public policy debates about E2EE and content moderation in the United States and European Union emphasize child sexual abuse material and misinformation in messaging and storage, we identify and synthesize a wealth of scholarship that goes far beyond those topics. We bridge literature that is diverse in both content moderation subject matter, such as malware, spam, hate speech, terrorist content, and enterprise policy compliance, as well as intended deployments, including not only privacy-preserving content moderation for messaging, email, and cloud storage, but also private introspection of encrypted web traffic by middleboxes. In this work, we systematize the study of content moderation in E2EE settings. We set out a process pipeline for content moderation, drawing on a broad interdisciplinary literature that is not specific to E2EE. We examine cryptography and policy design choices at all stages of this pipeline, and we suggest areas of future research to fill gaps in literature and better understand possible paths forward.

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Section: Spam Filteringmentioning

confidence: 99%

Section: Rules and Patternsmentioning

confidence: 99%

SoK: Content Moderation for End-to-End Encryption

Scheffler

Mayer

2023

PoPETs

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A Comprehensive Survey on Secure Outsourced Computation and Its Applications

et al. 2019

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With the ever-increasing requirement of storage and computation resources, it is unrealistic for local devices (with limited sources) to implement large-scale data processing. Therefore, individuals or corporations incline to outsource their computation requirements to the cloud. However, data outsourcing brings security and privacy concerns to users when the cloud servers are not fully trusted. Recently, extensive research works are conducted, aiming at secure outsourcing schemes for diverse computational tasks via different technologies. In this survey, we provide a technical review and comparison of existing outsourcing schemes using diverse secure computation methods. Specifically, we begin the survey by describing security threats and requirements of secure outsourcing computation. Meanwhile, we introduce four secure techniques (i.e., secure multi-party computation, pseudorandom functions, software guard extensions, and perturbation approaches) and their related works. Then, we focus on the theories and evolution of homomorphic encryption, as well as the applications of the basic operations and application-specific tasks. Finally, we discuss the security and performance of existing works and give future directions in this field. INDEX TERMS Secure outsourced computing, privacy preserving, homomorphic encryption, secure outsourced machine learning, data processing.

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Towards practical homomorphic email filtering

Cited by 2 publications

References 11 publications

SoK: Content Moderation for End-to-End Encryption

SoK: Content Moderation for End-to-End Encryption

A Comprehensive Survey on Secure Outsourced Computation and Its Applications

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