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
Tracking the FREAK Attack
On Tuesday, March 3, 2015, researchers announced a new SSL/TLS vulnerability called the FREAK attack. It allows an attacker to intercept HTTPS connections between vulnerable clients and servers and force them to use weakened encryption, which the attacker can break to steal or manipulate sensitive data. This site is dedicated to tracking the impact of the attack and helping users test whether they
Attack of the week: FREAK (or ‘factoring the NSA for fun and profit’)
A Few Thoughts on Cryptographic Engineering Some random thoughts about crypto. Notes from a course I teach. Pictures of my dachshunds. I'm a cryptographer and professor at Johns Hopkins University. I've designed and analyzed cryptographic systems used in wireless networks, payment systems and digital content protection platforms. In my research I look at the various ways cryptography can be used t
FREAK についてまとめてみた - piyolog
輸出グレードのRSA暗号をサポートしていたことに起因する脆弱性FREAKに関する情報について関連情報をまとめます。 脆弱性概要 脆弱性の概要情報は次の通り。 愛称 FREAK (Factoring attack on RSA-EXPORT Keysの略) 輸出グレード暗号の強制使用に関する呼称 アイコン 無し CVE OpenSSL：CVE-2015-0204 Apple：CVE-2015-1067 Microsoft：CVE-2015-1637 発見者名 miTLS Inria(フランス国立情報学自動制御研究所)とMicrosoft Researchの合同チーム FREAK Attackの概要 中間者攻撃が行われるまでのFREAK Attackの流れは次の通り。(3月6日更新) MITMの攻撃成立条件 以下の条件が成立する場合、通信内容の盗聴や改ざんの影響を受ける可能性がある。 接続元・
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