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ionis 2015/06/11
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Logjam: PFS Deployment Guide
Published May 2015 Our study finds that the current real-world deployment of Diffie-Hellman is less secure than previously believed. This page explains how to properly deploy Diffie-Hellman on your server. We have three recommendations for correctly deploying Diffie-Hellman for TLS: Disable Export Cipher Suites. Even though modern browsers no longer support export suites, the FREAK and Logjam atta
ionis 2015/06/01
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Logjam Attackã«ã¤ã„ã¦ã¾ã¨ã‚ã¦ã¿ãŸ - piyolog
Diffie-Hellmanï¼ˆDHï¼‰éµäº¤æ›ã®è„†å¼±æ€§ã‚’ä½¿ã£ãŸTLSãƒ—ãƒãƒˆã‚³ãƒ«ã«å¯¾ã™ã‚‹æ”»æ’ƒã€ŒLogjam Attackã€ã«é–¢ã™ã‚‹æƒ…å ±ã‚’ã¾ã¨ã‚ã¾ã™ã€‚ è„†å¼±æ€§æ¦‚è¦ è„†å¼±æ€§ã®æ¦‚è¦æƒ…å ±ã¯æ¬¡ã®é€šã‚Šã€‚ æ„›ç§° Logjam Attack (æ”»æ’ƒæ‰‹æ³•ã®æ„›ç§°) Webã‚µã‚¤ãƒˆ https://weakdh.org/ ã‚¢ã‚¤ã‚³ãƒ³ ç„¡ã— CVE CVE-2015-1716(Microsoft) ç™ºè¦‹è€…å æ¬¡ã®åˆåŒãƒãƒ¼ãƒ ã«ã‚ˆã‚Šç™ºè¦‹ ãƒ•ãƒ©ãƒ³ã‚¹å›½ç«‹ç§‘å¦ç ”ç©¶ã‚»ãƒ³ã‚¿ãƒ¼(CNRS) ãƒ•ãƒ©ãƒ³ã‚¹å›½ç«‹æƒ…å ±å¦è‡ªå‹•åˆ¶å¾¡ç ”ç©¶æ‰€(INRIA) Microsoft Research ã‚¸ãƒ§ãƒ³ã‚ºãƒ›ãƒ—ã‚ãƒ³ã‚¹å¤§å¦ ãƒŸã‚·ã‚¬ãƒ³å¤§å¦ ãƒšãƒ³ã‚·ãƒ«ãƒãƒ‹ã‚¢å¤§å¦ Logjam Attackã®æ¦‚è¦ Diffie-Hellmanï¼ˆDHï¼‰éµäº¤æ›ã®è„†å¼±æ€§ã€‚ã“ã®è„†å¼±æ€§ã‚’ç”¨ã„ã¦ä¸é–“è€…æ”»æ’ƒãŒè¡Œã‚ã‚Œã¦ã„ã‚‹ç’°å¢ƒã«ãŠã„ã¦ã€TLSæŽ¥ç¶šã‚’512bitã®è¼¸å‡ºã‚°ãƒ¬ãƒ¼ãƒ‰æš—å·ã«ãƒ€ã‚¦ãƒ³ã‚°ãƒ¬ãƒ¼ãƒ‰ã—ã€é€šä¿¡çµŒ
ionis 2015/05/27
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Announcement: ELB stickiness updates to support Feb 2020 Chromium CORs changes
You have been redirected here because the page you are trying to access has been archived. AWS re:Post is a cloud knowledge service launched at re:Invent 2021. We've migrated selected questions and answers from Forums to AWS re:Post. The thread you are trying to access has outdated guidance, hence we have archived it. If you would like up-to-date guidance, then share your question via AWS re:Post.
ionis 2015/05/25
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[PDF]Imperfect Forward Secrecy: How Diffie-Hellman Fails in Practice
Imperfect Forward Secrecy: How Diffie-Hellman Fails in Practice David AdrianÂ¶ Karthikeyan Bhargavanâˆ— Zakir DurumericÂ¶ Pierrick Gaudryâ€ Matthew GreenÂ§ J. Alex HaldermanÂ¶ Nadia Heningerâ€¡ Drew SpringallÂ¶ Emmanuel ThomÃ©â€ Luke Valentaâ€¡ Benjamin VanderSlootÂ¶ Eric WustrowÂ¶ Santiago Zanella-BÃ©guelink Paul Zimmermannâ€ âˆ— INRIA Paris-Rocquencourt â€ INRIA Nancy-Grand Est, CNRS, and UniversitÃ© de Lorraine k Mi
ionis 2015/05/21
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'Logjam' crypto bug could be how the NSA cracked VPNs
Updated A team led by Johns Hopkins crypto researcher Matthew Green* thinks they might have an explanation for how the NSA attacked VPN services: flaws in how TLS implements Diffie-Hellman crytography. In what's bound to be the next big branded bug, Green says servers that support 512-key â€œexport-gradeâ€ Diffie-Hellman (DH) can be forced to downgrade a connection to that weak level. The server â€“ an
ionis 2015/05/21
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Weak Diffie-Hellman and the Logjam Attack
Diffie-Hellman key exchange is a popular cryptographic algorithm that allows Internet protocols to agree on a shared key and negotiate a secure connection. It is fundamental to many protocols including HTTPS, SSH, IPsec, SMTPS, and protocols that rely on TLS. We have uncovered several weaknesses in how Diffie-Hellman key exchange has been deployed: Logjam attack against the TLS protocol. The Logja
ionis 2015/05/21
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ionis 2015/05/21
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