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密码学小组组织及其任务與加入辦法
第八波密码学小组成员名单如下: 信息及实践组: zyyxl, lookzo, 1)请静待坛主设置系统。 2)设置后请别忘记签到。 3) cnbragon 版主列入這波名單,已先行完成設置。 |
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[分享]GPUs + Information Security issue papers.
說實話,我對 GPU 沒研究。 如果 那本書對編程的人或是程序員有幫助的話,倒可以閱讀看看。 還有,密碼板上,今天及昨天我分別把平行計算(parallel comuting)或是分散式計算(distribution computing)應用在破解 RSA 等密碼系統上的文章,張貼上去了,有空可以撥時間看看。 謝謝。 |
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[分享]Beginners Guide to NFS factoring using GGNFS and MSIEVE
Tuesday, August 25, 2009 Solo Desktop Factorization of an RSA-512 Key It was recently announced that Benjamin Moody has factored an RSA-512 bit key in 73 hours using only public software and his desktop computer. The first RSA-512 factorization in 1999 required the equivalent of 8,400 MIPS years over an elapsed time of about 7 months. The announcement was made all the more intriguing in that it came from a mailing list associated with a user forum for Texas Instruments calculators. The public key in question is used to verify signed OS binaries for the TI 83 Plus and the factorization means that … any operating system can be cryptographically signed in a manner identical to that of the original TI-OS. Third party operating systems can thus be loaded on any 83+ calculators without the use of any extra software (that was mentioned in recent news). Complete programming freedom has finally been achieved on the TI-83 Plus! The original post from Moody was not very informative, but the subsequent Q & A thread drew out more details. Moody used public source factoring software on a dual-core Athlon64 at 1900 MHz. Just under 5 gigabytes of disk was required and about 2.5 gigabytes of RAM for the sieving process. The final computation involved finding the null space of a 5.4 million x 5.4 million matrix. Most security people would rightly claim that RSA-512 is known to be provide little security as a keylength, however this does not mean that 512-bit public keys are not in use today by companies other than Texas Instruments. By the way, someone is offering an RSA 512 factoring service with a “price indication” of $5000. Source from http://lukenotricks.blogspot.com/2009/08/solo-desktop-factorization-of-rsa-512.html |
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[原创]福州流感严重啊
下星期還打算去廈門呢~會不會被影響? |
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[求助]我一直很好奇。海风大大是男的还是女的?
看了半天,到底是公還是母的!? |
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