From sshen@huawei.com Tue May 5 18:49:36 2009 Return-Path: X-Original-To: cga-ext@core3.amsl.com Delivered-To: cga-ext@core3.amsl.com Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id A6B7D3A6951 for ; Tue, 5 May 2009 18:49:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.197 X-Spam-Level: X-Spam-Status: No, score=-0.197 tagged_above=-999 required=5 tests=[AWL=0.297, BAYES_00=-2.599, FH_RELAY_NODNS=1.451, HELO_MISMATCH_COM=0.553, HTML_MESSAGE=0.001, RDNS_NONE=0.1] Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MqSi0Ps+7lAJ for ; Tue, 5 May 2009 18:49:36 -0700 (PDT) Received: from szxga01-in.huawei.com (unknown [119.145.14.64]) by core3.amsl.com (Postfix) with ESMTP id D524D3A68F2 for ; Tue, 5 May 2009 18:49:35 -0700 (PDT) Received: from huawei.com (szxga01-in [172.24.2.3]) by szxga01-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0KJ700CU994RLK@szxga01-in.huawei.com> for cga-ext@ietf.org; Wed, 06 May 2009 09:50:52 +0800 (CST) Received: from huawei.com ([172.24.1.33]) by szxga01-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0KJ700BEZ94R0X@szxga01-in.huawei.com> for cga-ext@ietf.org; Wed, 06 May 2009 09:50:51 +0800 (CST) Received: from s00102542 ([10.111.12.128]) by szxml06-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPA id <0KJ700JTG94NTU@szxml06-in.huawei.com> for cga-ext@ietf.org; Wed, 06 May 2009 09:50:51 +0800 (CST) Date: Wed, 06 May 2009 09:50:47 +0800 From: shenshuo To: cga-ext@ietf.org Message-id: <006201c9cded$13cb3ec0$800c6f0a@china.huawei.com> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-Mailer: Microsoft Office Outlook 11 Content-type: multipart/alternative; boundary="Boundary_(ID_oX6gISiirVBzXJqAkfEK+A)" Thread-index: AcnN7RNkcDFzwY1RRMuuZskMCzqcyg== Subject: [CGA-EXT] improvement on finding SHA-1 collissions X-BeenThere: cga-ext@ietf.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: CGA and SeND Extensions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 May 2009 01:49:36 -0000 This is a multi-part message in MIME format. --Boundary_(ID_oX6gISiirVBzXJqAkfEK+A) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT It has just been anounced on rump session of Eurocrypt2009 that complexity of finding SHA-1 collision has been reduced to 2^52. http://eurocrypt2009rump.cr.yp.to/837a0a8086fa6ca714249409ddfae43d.pdf Detailed paper hopefully will appear soon on eprint. I suggest attentions on this issue. It will be necessary accomodate it to threat analysis and consider possible affection on the other ongoing works. --Boundary_(ID_oX6gISiirVBzXJqAkfEK+A) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT
It has just been anounced on rump session of Eurocrypt2009 that complexity of finding SHA-1 collision has been reduced to 2^52.
Detailed paper hopefully will appear soon on eprint. 
 
I suggest attentions on this issue. It will be necessary accomodate it to threat analysis and consider possible affection on the other ongoing works.  
--Boundary_(ID_oX6gISiirVBzXJqAkfEK+A)--