G. Moura, J. Heidemann, M. Müller, R. Schmidt, Marco Davids
The Internet's Domain Name System (DNS) is a frequent target of Distributed Denial-of-Service (DDoS) attacks, but such attacks have had very different outcomes---some attacks have disabled major public websites, while the external effects of other attacks have been minimal. While on one hand the DNS protocol is relatively simple, the system has many moving parts, with multiple levels of caching and retries and replicated servers. This paper uses controlled experiments to examine how these mechanisms affect DNS resilience and latency, exploring both the client side's DNS user experience, and server-side traffic. We find that, for about 30% of clients, caching is not effective. However, when caches are full they allow about half of clients to ride out server outages that last less than cache lifetimes, caching and retries together allow up to half of the clients to tolerate DDoS attacks longer than cache lifetimes, with 90% query loss, and almost all clients to tolerate attacks resulting in 50% packet loss. While clients may get service during an attack, tail-latency increases for clients. For servers, retries during DDoS attacks increase normal traffic up to 8x. Our findings about caching and retries help explain why users see service outages from some real-world DDoS events, but minimal visible effects from others.
{"title":"When the Dike Breaks: Dissecting DNS Defenses During DDoS","authors":"G. Moura, J. Heidemann, M. Müller, R. Schmidt, Marco Davids","doi":"10.1145/3278532.3278534","DOIUrl":"https://doi.org/10.1145/3278532.3278534","url":null,"abstract":"The Internet's Domain Name System (DNS) is a frequent target of Distributed Denial-of-Service (DDoS) attacks, but such attacks have had very different outcomes---some attacks have disabled major public websites, while the external effects of other attacks have been minimal. While on one hand the DNS protocol is relatively simple, the system has many moving parts, with multiple levels of caching and retries and replicated servers. This paper uses controlled experiments to examine how these mechanisms affect DNS resilience and latency, exploring both the client side's DNS user experience, and server-side traffic. We find that, for about 30% of clients, caching is not effective. However, when caches are full they allow about half of clients to ride out server outages that last less than cache lifetimes, caching and retries together allow up to half of the clients to tolerate DDoS attacks longer than cache lifetimes, with 90% query loss, and almost all clients to tolerate attacks resulting in 50% packet loss. While clients may get service during an attack, tail-latency increases for clients. For servers, retries during DDoS attacks increase normal traffic up to 8x. Our findings about caching and retries help explain why users see service outages from some real-world DDoS events, but minimal visible effects from others.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90388721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhijing Li, Zihui Ge, A. Mahimkar, Jia Wang, Ben Y. Zhao, Haitao Zheng, Joanne Emmons, L. Ogden
Recent deployments of Network Function Virtualization (NFV) architectures have gained tremendous traction. While virtualization introduces benefits such as lower costs and easier deployment of network functions, it adds additional layers that reduce transparency into faults at lower layers. To improve fault analysis and prediction for virtualized network functions (VNF), we envision a runtime predictive analysis system that runs in parallel with existing reactive monitoring systems to provide network operators timely warnings against faulty conditions. In this paper, we propose a deep learning based approach to reliably identify anomaly events from NFV system logs, and perform an empirical study using 18 consecutive months in 2016--2018 of real-world deployment data on virtualized provider edge routers. Our deep learning models, combined with customization and adaptation mechanisms, can successfully identify anomalous conditions that correlate with network trouble tickets. Analyzing these anomalies can help operators to optimize trouble ticket generation and processing rules in order to enable fast, or even proactive actions against faulty conditions.
{"title":"Predictive Analysis in Network Function Virtualization","authors":"Zhijing Li, Zihui Ge, A. Mahimkar, Jia Wang, Ben Y. Zhao, Haitao Zheng, Joanne Emmons, L. Ogden","doi":"10.1145/3278532.3278547","DOIUrl":"https://doi.org/10.1145/3278532.3278547","url":null,"abstract":"Recent deployments of Network Function Virtualization (NFV) architectures have gained tremendous traction. While virtualization introduces benefits such as lower costs and easier deployment of network functions, it adds additional layers that reduce transparency into faults at lower layers. To improve fault analysis and prediction for virtualized network functions (VNF), we envision a runtime predictive analysis system that runs in parallel with existing reactive monitoring systems to provide network operators timely warnings against faulty conditions. In this paper, we propose a deep learning based approach to reliably identify anomaly events from NFV system logs, and perform an empirical study using 18 consecutive months in 2016--2018 of real-world deployment data on virtualized provider edge routers. Our deep learning models, combined with customization and adaptation mechanisms, can successfully identify anomalous conditions that correlate with network trouble tickets. Analyzing these anomalies can help operators to optimize trouble ticket generation and processing rules in order to enable fast, or even proactive actions against faulty conditions.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74184977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haotian Deng, Chunyi Peng, Ans Fida, Jiayi Meng, Y. C. Hu
In this paper, we conduct the first global-scale measurement study to unveil how 30 mobile operators manage mobility support in their carrier networks. Using a novel, device-centric tool, MMLab, we are able to crawl runtime configurations without the assistance from operators. Using handoff configurations from 32,000+ cells and > 18,700 handoff instances, we uncover how policy-based handoffs work in practice. We further study how the configuration parameters affect the handoff performance and user data access. Our study exhibits three main points regarding handoff configurations. 1) Operators deploy extremely complex and diverse configurations to control how handoff is performed. 2) The setting of handoff configuration values affect data performance in a rational way. 3) While giving better control granularity over handoff procedures, such diverse configurations also lead to unexpected negative compound effects to performance and efficiency. Moreover, our study of mobility support through a device-side approach gives valuable insights to network operators, mobile users and the research community.
{"title":"Mobility Support in Cellular Networks: A Measurement Study on Its Configurations and Implications","authors":"Haotian Deng, Chunyi Peng, Ans Fida, Jiayi Meng, Y. C. Hu","doi":"10.1145/3278532.3278546","DOIUrl":"https://doi.org/10.1145/3278532.3278546","url":null,"abstract":"In this paper, we conduct the first global-scale measurement study to unveil how 30 mobile operators manage mobility support in their carrier networks. Using a novel, device-centric tool, MMLab, we are able to crawl runtime configurations without the assistance from operators. Using handoff configurations from 32,000+ cells and > 18,700 handoff instances, we uncover how policy-based handoffs work in practice. We further study how the configuration parameters affect the handoff performance and user data access. Our study exhibits three main points regarding handoff configurations. 1) Operators deploy extremely complex and diverse configurations to control how handoff is performed. 2) The setting of handoff configuration values affect data performance in a rational way. 3) While giving better control granularity over handoff procedures, such diverse configurations also lead to unexpected negative compound effects to performance and efficiency. Moreover, our study of mobility support through a device-side approach gives valuable insights to network operators, mobile users and the research community.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86201404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proceedings of the Internet Measurement Conference 2018","authors":"","doi":"10.1145/3278532","DOIUrl":"https://doi.org/10.1145/3278532","url":null,"abstract":"","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88871886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mallesham Dasari, Santiago Vargas, A. Bhattacharya, A. Balasubramanian, Samir R Das, M. Ferdman
A large fraction of users in developing regions use relatively inexpensive, low-end smartphones. However, the impact of device capabilities on the performance of mobile Internet applications has not been explored. To bridge this gap, we study the QoE of three popular applications -- Web browsing, video streaming, and video telephony -- for different device parameters. Our results demonstrate that the performance of Web browsing is much more sensitive to low-end hardware than that of video applications, especially video streaming. This is because the video applications exploit specialized coprocessors/accelerators and thread-level parallelism on multi-core mobile devices. Even low-end devices are equipped with needed coprocessors and multiple cores. In contrast, Web browsing is largely influenced by clock frequency, but it uses no more than two cores. This makes the performance of Web browsing more vulnerable on low-end smartphones. Based on the lessons learned from studying video applications, we explore offloading Web computation to a coprocessor. Specifically, we explore the offloading of regular expression computation to a DSP coprocessor and show an improvement of 18% in page load time while saving energy by a factor of four.
{"title":"Impact of Device Performance on Mobile Internet QoE","authors":"Mallesham Dasari, Santiago Vargas, A. Bhattacharya, A. Balasubramanian, Samir R Das, M. Ferdman","doi":"10.1145/3278532.3278533","DOIUrl":"https://doi.org/10.1145/3278532.3278533","url":null,"abstract":"A large fraction of users in developing regions use relatively inexpensive, low-end smartphones. However, the impact of device capabilities on the performance of mobile Internet applications has not been explored. To bridge this gap, we study the QoE of three popular applications -- Web browsing, video streaming, and video telephony -- for different device parameters. Our results demonstrate that the performance of Web browsing is much more sensitive to low-end hardware than that of video applications, especially video streaming. This is because the video applications exploit specialized coprocessors/accelerators and thread-level parallelism on multi-core mobile devices. Even low-end devices are equipped with needed coprocessors and multiple cores. In contrast, Web browsing is largely influenced by clock frequency, but it uses no more than two cores. This makes the performance of Web browsing more vulnerable on low-end smartphones. Based on the lessons learned from studying video applications, we explore offloading Web computation to a coprocessor. Specifically, we explore the offloading of regular expression computation to a DSP coprocessor and show an improvement of 18% in page load time while saving energy by a factor of four.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88872744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Tian, Steve T. K. Jan, Hang Hu, D. Yao, G. Wang
Today's phishing websites are constantly evolving to deceive users and evade the detection. In this paper, we perform a measurement study on squatting phishing domains where the websites impersonate trusted entities not only at the page content level but also at the web domain level. To search for squatting phishing pages, we scanned five types of squatting domains over 224 million DNS records and identified 657K domains that are likely impersonating 702 popular brands. Then we build a novel machine learning classifier to detect phishing pages from both the web and mobile pages under the squatting domains. A key novelty is that our classifier is built on a careful measurement of evasive behaviors of phishing pages in practice. We introduce new features from visual analysis and optical character recognition (OCR) to overcome the heavy content obfuscation from attackers. In total, we discovered and verified 1,175 squatting phishing pages. We show that these phishing pages are used for various targeted scams, and are highly effective to evade detection. More than 90% of them successfully evaded popular blacklists for at least a month.
{"title":"Needle in a Haystack: Tracking Down Elite Phishing Domains in the Wild","authors":"K. Tian, Steve T. K. Jan, Hang Hu, D. Yao, G. Wang","doi":"10.1145/3278532.3278569","DOIUrl":"https://doi.org/10.1145/3278532.3278569","url":null,"abstract":"Today's phishing websites are constantly evolving to deceive users and evade the detection. In this paper, we perform a measurement study on squatting phishing domains where the websites impersonate trusted entities not only at the page content level but also at the web domain level. To search for squatting phishing pages, we scanned five types of squatting domains over 224 million DNS records and identified 657K domains that are likely impersonating 702 popular brands. Then we build a novel machine learning classifier to detect phishing pages from both the web and mobile pages under the squatting domains. A key novelty is that our classifier is built on a careful measurement of evasive behaviors of phishing pages in practice. We introduce new features from visual analysis and optical character recognition (OCR) to overcome the heavy content obfuscation from attackers. In total, we discovered and verified 1,175 squatting phishing pages. We show that these phishing pages are used for various targeted scams, and are highly effective to evade detection. More than 90% of them successfully evaded popular blacklists for at least a month.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88833883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zahaib Akhtar, Yun Seong Nam, Jessica Chen, R. Govindan, Ethan Katz-Bassett, Sanjay G. Rao, Jibin Zhan, Hui Zhang
While Internet video control and data planes have received much research attention, little is known about the video management plane. In this paper, using data from more than a hundred video publishers spanning two years, we characterize the video management plane and its evolution. The management plane shows significant diversity with respect to video packaging, playback device support, and CDN use, and current trends suggest increasing diversity in some of these dimensions. This diversity adds complexity to management, and we show that the complexity of many management tasks is sub-linearly correlated with the number of hours a publisher's content is viewed. Moreover, today each publisher runs an independent management plane, and this practice can lead to sub-optimal outcomes for syndicated content, such as redundancies in CDN storage and loss of control for content owners over delivery quality.
{"title":"Understanding Video Management Planes","authors":"Zahaib Akhtar, Yun Seong Nam, Jessica Chen, R. Govindan, Ethan Katz-Bassett, Sanjay G. Rao, Jibin Zhan, Hui Zhang","doi":"10.1145/3278532.3278554","DOIUrl":"https://doi.org/10.1145/3278532.3278554","url":null,"abstract":"While Internet video control and data planes have received much research attention, little is known about the video management plane. In this paper, using data from more than a hundred video publishers spanning two years, we characterize the video management plane and its evolution. The management plane shows significant diversity with respect to video packaging, playback device support, and CDN use, and current trends suggest increasing diversity in some of these dimensions. This diversity adds complexity to management, and we show that the complexity of many management tasks is sub-linearly correlated with the number of hours a publisher's content is viewed. Moreover, today each publisher runs an independent management plane, and this practice can lead to sub-optimal outcomes for syndicated content, such as redundancies in CDN storage and loss of control for content owners over delivery quality.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82162463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Louis F. DeKoven, Trevor Pottinger, S. Savage, G. Voelker, Nektarios Leontiadis
Online social networks routinely attract abuse from for-profit services that offer to artificially manipulate a user's social standing. In this paper, we examine five such services in depth, each advertising the ability to inflate their customer's standing on the Instagram social network. We identify the techniques used by these services to drive social actions, and how they are structured to evade straightforward detection. We characterize the dynamics of their customer base over several months and show that they are able to attract a large clientele and generate over $1M in monthly revenue. Finally, we construct controlled experiments to disrupt these services and analyze how different approaches to intervention (i.e., transparent interventions such as blocking abusive services vs. more opaque approaches such as deferred removal of artificial actions) can drive different reactions and thus provide distinct trade-offs for defenders.
{"title":"Following Their Footsteps: Characterizing Account Automation Abuse and Defenses","authors":"Louis F. DeKoven, Trevor Pottinger, S. Savage, G. Voelker, Nektarios Leontiadis","doi":"10.1145/3278532.3278537","DOIUrl":"https://doi.org/10.1145/3278532.3278537","url":null,"abstract":"Online social networks routinely attract abuse from for-profit services that offer to artificially manipulate a user's social standing. In this paper, we examine five such services in depth, each advertising the ability to inflate their customer's standing on the Instagram social network. We identify the techniques used by these services to drive social actions, and how they are structured to evade straightforward detection. We characterize the dynamics of their customer base over several months and show that they are able to attract a large clientele and generate over $1M in monthly revenue. Finally, we construct controlled experiments to disrupt these services and analyze how different approaches to intervention (i.e., transparent interventions such as blocking abusive services vs. more opaque approaches such as deferred removal of artificial actions) can drive different reactions and thus provide distinct trade-offs for defenders.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78879182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Richter, Ramakrishna Padmanabhan, N. Spring, A. Berger, D. Clark
Measuring reliability of edge networks in the Internet is difficult due to the size and heterogeneity of networks, the rarity of outages, and the difficulty of finding vantage points that can accurately capture such events at scale. In this paper, we use logs from a major CDN, detailing hourly request counts from address blocks. We discovered that in many edge address blocks, devices, collectively, contact the CDN every hour over weeks and months. We establish that a sudden temporary absence of these requests indicates a loss of Internet connectivity of those address blocks, events we call disruptions. We develop a disruption detection technique and present broad and detailed statistics on 1.5M disruption events over the course of a year. Our approach reveals that disruptions do not necessarily reflect actual service outages, but can be the result of prefix migrations. Major natural disasters are clearly represented in our data as expected; however, a large share of detected disruptions correlate well with planned human intervention during scheduled maintenance intervals, and are thus unlikely to be caused by external factors. Cross-evaluating our results we find that current state-of-the-art active outage detection over-estimates the occurrence of disruptions in some address blocks. Our observations of disruptions, service outages, and different causes for such events yield implications for the design of outage detection systems, as well as for policymakers seeking to establish reporting requirements for Internet services.
{"title":"Advancing the Art of Internet Edge Outage Detection","authors":"P. Richter, Ramakrishna Padmanabhan, N. Spring, A. Berger, D. Clark","doi":"10.1145/3278532.3278563","DOIUrl":"https://doi.org/10.1145/3278532.3278563","url":null,"abstract":"Measuring reliability of edge networks in the Internet is difficult due to the size and heterogeneity of networks, the rarity of outages, and the difficulty of finding vantage points that can accurately capture such events at scale. In this paper, we use logs from a major CDN, detailing hourly request counts from address blocks. We discovered that in many edge address blocks, devices, collectively, contact the CDN every hour over weeks and months. We establish that a sudden temporary absence of these requests indicates a loss of Internet connectivity of those address blocks, events we call disruptions. We develop a disruption detection technique and present broad and detailed statistics on 1.5M disruption events over the course of a year. Our approach reveals that disruptions do not necessarily reflect actual service outages, but can be the result of prefix migrations. Major natural disasters are clearly represented in our data as expected; however, a large share of detected disruptions correlate well with planned human intervention during scheduled maintenance intervals, and are thus unlikely to be caused by external factors. Cross-evaluating our results we find that current state-of-the-art active outage detection over-estimates the occurrence of disruptions in some address blocks. Our observations of disruptions, service outages, and different causes for such events yield implications for the design of outage detection systems, as well as for policymakers seeking to establish reporting requirements for Internet services.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78393556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Taejoong Chung, J. Lok, B. Chandrasekaran, D. Choffnes, Dave Levin, B. Maggs, A. Mislove, John P. Rula, N. Sullivan, Christo Wilson
TLS, the de facto standard protocol for securing communications over the Internet, relies on a hierarchy of certificates that bind names to public keys. Naturally, ensuring that the communicating parties are using only valid certificates is a necessary first step in order to benefit from the security of TLS. To this end, most certificates and clients support OCSP, a protocol for querying a certificate's revocation status and confirming that it is still valid. Unfortunately, however, OCSP has been criticized for its slow performance, unreliability, soft-failures, and privacy issues. To address these issues, the OCSP Must-Staple certificate extension was introduced, which requires web servers to provide OCSP responses to clients during the TLS handshake, making revocation checks low-cost for clients. Whether all of the players in the web's PKI are ready to support OCSP Must-Staple, however, remains still an open question. In this paper, we take a broad look at the web's PKI and determine if all components involved---namely, certificate authorities, web server administrators, and web browsers---are ready to support OCSP Must-Staple. We find that each component does not yet fully support OCSP Must-Staple: OCSP responders are still not fully reliable, and most major web browsers and web server implementations do not fully support OCSP Must-Staple. On the bright side, only a few players need to take action to make it possible for web server administrators to begin relying on certificates with OCSP Must-Staple. Thus, we believe a much wider deployment of OCSP Must-Staple is an realistic and achievable goal.
{"title":"Is the Web Ready for OCSP Must-Staple?","authors":"Taejoong Chung, J. Lok, B. Chandrasekaran, D. Choffnes, Dave Levin, B. Maggs, A. Mislove, John P. Rula, N. Sullivan, Christo Wilson","doi":"10.1145/3278532.3278543","DOIUrl":"https://doi.org/10.1145/3278532.3278543","url":null,"abstract":"TLS, the de facto standard protocol for securing communications over the Internet, relies on a hierarchy of certificates that bind names to public keys. Naturally, ensuring that the communicating parties are using only valid certificates is a necessary first step in order to benefit from the security of TLS. To this end, most certificates and clients support OCSP, a protocol for querying a certificate's revocation status and confirming that it is still valid. Unfortunately, however, OCSP has been criticized for its slow performance, unreliability, soft-failures, and privacy issues. To address these issues, the OCSP Must-Staple certificate extension was introduced, which requires web servers to provide OCSP responses to clients during the TLS handshake, making revocation checks low-cost for clients. Whether all of the players in the web's PKI are ready to support OCSP Must-Staple, however, remains still an open question. In this paper, we take a broad look at the web's PKI and determine if all components involved---namely, certificate authorities, web server administrators, and web browsers---are ready to support OCSP Must-Staple. We find that each component does not yet fully support OCSP Must-Staple: OCSP responders are still not fully reliable, and most major web browsers and web server implementations do not fully support OCSP Must-Staple. On the bright side, only a few players need to take action to make it possible for web server administrators to begin relying on certificates with OCSP Must-Staple. Thus, we believe a much wider deployment of OCSP Must-Staple is an realistic and achievable goal.","PeriodicalId":20640,"journal":{"name":"Proceedings of the Internet Measurement Conference 2018","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87348666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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