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Tag Archives: openssl
手機上用 FPGA 的想法...
在「Apps with hardware: enabling run-time architectural customization in smart phones」這邊看到去年就有論文在討論在手機上使用 FPGA 的想法... 的確現在 FPGA 的價錢其實是蠻平價的了... 除了透過 GPU 加速外，FPGA 聽起來也是個不錯的方向 @_@ 最直接的例子就是 AES 運算來看，可以看到比現在最快的實做快了半個數量級，大約三倍？(跟支援硬體加速的 OpenSSL 比，看格子大約是半格，也就是 100.5，約 3.16 倍)。 而如果是純軟體的應用，有些會差到四個數量級... (萬？)
OpenSSL 1.1.1 將支援 TLS 1.3
OpenSSL 的文章「Using TLS1.3 With OpenSSL」提到了： The forthcoming OpenSSL 1.1.1 release will include support for TLSv1.3. 另外也提到了 TLS 1.3 的標準是 blocker，在 TLS 1.3 沒出來前不會出 OpenSSL 1.1.1： OpenSSL 1.1.1 will not be released until (at least) TLSv1.3 is finalised. OpenSSL 實做的 TLS … Continue reading
OpenSSL 將轉為 Apache 2.0 License
OpenSSL 最近打算把原本的 license 換成 Apache License, Version 2.0：「Licensing Update」。 主要的原因是希望相容於現有大多數的 open source project： OpenSSL Re-licensing to Apache License v. 2.0 To Encourage Broader Use with Other FOSS Projects and Products 但這非常詭異啊，舊的 license 最大的問題就是與 GPLv2 不相容，而預定要換的 AL 2.0 也還是不相容啊，搞屁啊。
Alpine Linux 決定將 OpenSSL 換成 LibreSSL
之前看到 Alpine Linux 是從 Docker 這邊看到的，可以弄出還蠻小巧的 image... 前幾天看到他們宣佈打算將 OpenSSL 換掉，換成 LibreSSL：「[alpine-devel] Alpine edge has switched to libressl」。而且理由也講的頗直接，覺得 OpenSSL 的改善速度還是不滿意，而且市場上有其他還不錯的方案可以選： While OpenSSL is trying to fix the broken code, libressl has simply removed it. 這樣 LibreSSL 又多了生力軍，之前比較大的應該只有 OpenBSD...
OpenSSL 1.1.0
看到「OpenSSL 1.1.0 released」這篇得知大家期待已久的 OpenSSL 1.1.0 出了，在 1.1.0 的重要新功能中，對 ChaCha20 + Poly1305 的支援算是大家等很久的： Support for ChaCha20 and Poly1305 added to libcrypto and libssl 由於 RC4 已經被證明不安全，OpenSSL 內變成沒有堪用的 stream cipher，這邊總算要補上來了... 另外兩個也頗有趣的： Support for scrypt algorithm Support for X25519 多了些東西...
Netflix 對 sendfile() 在 TLS 情況下的加速
Netflix 對於寫了一篇關於隱私保護的技術細節：「Protecting Netflix Viewing Privacy at Scale」。 其中講到 2012 年的 Netflix Open Connect 中的 Open Connect Appliance (OCA，放伺服器到 ISP 機房的計畫) 只有單台伺服器 8Gbps，到現在 2016 可以達到 90Gbps： As we mentioned in a recent company blog post, since the beginning of the Open … Continue reading
Posted in Computer, FreeBSD, Hardware, Movie, Murmuring, Network, OS, Programming, Recreation, Security, Software, Television, WWW
Tagged aes, appliance, boringssl, cbc, connect, cpu, freebsd, gcm, hardware, https, kernel, lacp, land, netflix, open, openssl, performance, privacy, sendfile, space, ssl, tls, user, write
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OpenSSL 的 DSA 被 Side-channel attack 打爆
在「Make Sure DSA Signing Exponentiations Really are Constant-Time」這篇文章裡面，直接透過 end-to-end 的 timing attack 打爆 (也就是透過 internet 觀察攻擊)，而不需要在同一台機器上對 cache 之類的區域攻擊： A unique feature of our work is that we target common cryptographic protocols. Previous works that demonstrate cache-timing key-recovery attack only target … Continue reading
Google Chrome 51 出版，SPDY 被拔掉，HTTP/2 只支援 ALPN
Google Chrome 剛剛出了 51 版：「Stable Channel Update」。 除了界面的改變外，對效能最主要的改變就是 SPDY 被拔掉，HTTP/2 的 NPN 支援也被拔掉：「Transitioning from SPDY to HTTP/2」： To better align with Chrome's release cycle, SPDY and NPN support will be removed with the release of Chrome 51. 又有一波 migrate 功夫要做了...
最近的兩個安全性漏洞：OpenSSL、ImageMagick
OpenSSL 的安全性漏洞公告：「OpenSSL Security Advisory [3rd May 2016]」。ImageMagick 的安全性漏洞說明頁：「ImageTragick」。 CVE-2016-2107 是修 Lucky 13 問題時沒修好造成的： This issue was introduced as part of the fix for Lucky 13 padding attack (CVE-2013-0169). The padding check was rewritten to be in constant time by making … Continue reading
Posted in Computer, Murmuring, Security, Software
Tagged cve, imagemagick, openssl, security
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OpenSSL 1.1.0 的 Release Notes 先放出來了 (現在是 Beta 1)
雖然才 Beta 1，但 OpenSSL 先放出 1.1.0 的 Release Notes 了：「OpenSSL 1.1.0 Series Release Notes」。 有幾個新的功能以及重大的改變，包括了對 ChaCha20 與 Poly1305 的支援，並且把 SSLv2、RC4、所有 40bits 與 56bits 的 cipher 拔掉，然後支援 Certificate Transparency。 讓人頗期待... 不知道來不來得及跟上 Ubuntu 16.04？