QQ登录

只需要一步,快速开始

 注册地址  找回密码
查看: 36211|回复: 5
打印 上一主题 下一主题

每日科技报告 第20期 Secure Radio Signal for Central Locking

[复制链接]
字体大小: 正常 放大

522

主题

10

听众

4072

积分

升级  69.07%

  • TA的每日心情
    奋斗
    2015-1-3 17:18
  • 签到天数: 6 天

    [LV.2]偶尔看看I

    自我介绍
    学习中!

    优秀斑竹奖 元老勋章 新人进步奖 最具活力勋章

    群组Matlab讨论组

    群组C 语言讨论组

    群组每天多学一点点

    群组数学趣味、游戏、IQ等

    群组南京邮电大学数模协会

    跳转到指定楼层
    1#
    发表于 2010-2-4 20:06 |只看该作者 |倒序浏览
    |招呼Ta 关注Ta
    Remote central locking is among the most convenient aspects of modern motoring. Transmission of the radio signal that activates the system is not particularly secure, however. A new encryption technique increases security without draining the key's battery.
    Secure Radio Signal for Central Locking
    An asymmetric algorithm in this car key ensures high security when the car door is unlocked by radio signal, but does not drain the battery.

    Most drivers love the convenience of remote central locking -- the car doors are locked or unlocked just by pressing a button on the key. These systems are not particularly secure, however, as a potential car thief can, for example, use an antenna to eavesdrop on the radio signal and create a second key from the captured data on a computer. The reason for this weakness in security is that the algorithms which encrypt the signals sent from the key to the vehicle are not strong enough. Their code was broken about two years ago.
    Car manufacturers are therefore using new algorithms to make the radio key systems more secure. But these algorithms too have a major disadvantage -- they are symmetric, their codes are embedded in the key and in the car. Also, the same coded information is embedded in numerous vehicles from the same production line. Once one code has been broken, numerous cars are at risk.
    Research scientists at the Fraunhofer Institute for Secure Information Technology SIT in Garching have now used an asymmetric algorithm to develop a car key prototype for the first time.
    "With this type of algorithm the secret is only located in the car key, and not in the car as well," explains Johann Heyszl, a scientist at the SIT. "Each car key incorporates a different code, and this makes the encryption much more secure than when a symmetric algorithm is used."
    Up to now the high computation intensity and associated high energy consumption posed a high barrier against the use of asymmetric algorithms. "We have built a small cryptographic chip which is particularly energy-saving. In addition, we have developed a new, efficient protocol which minimizes computation effort and the amount of data that has to be transmitted," says Heyszl. As a result, the battery life of the key is about the same as in symmetric encryption, but the new system is much more secure. The electronic immobilizer is encrypted in the same way as remote central locking.
    zan
    转播转播0 分享淘帖0 分享分享0 收藏收藏0 支持支持0 反对反对0 微信微信
    第一次用linux登录madio,纪念一下
    legan 实名认证       

    9

    主题

    4

    听众

    1376

    积分

    升级  37.6%

  • TA的每日心情
    开心
    2013-11-7 15:01
  • 签到天数: 13 天

    [LV.3]偶尔看看II

    新人进步奖

    回复

    使用道具 举报

    32

    主题

    6

    听众

    1077

    积分

  • TA的每日心情
    开心
    2011-12-15 19:30
  • 签到天数: 1 天

    [LV.1]初来乍到

    自我介绍
    活泼开朗,数学是兴趣,不是专业

    新人进步奖

    回复

    使用道具 举报

    sarah2014 实名认证       

    0

    主题

    4

    听众

    280

    积分

    升级  90%

    该用户从未签到

    新人进步奖

    A new encryption technique increases security without draining the key's battery.
    老美的思维还真是独特呢~更安全了还不费电。。。笑死~
                                                                                   by 得到了楼主的回复兴趣大增的sarah~嘿嘿
    回复

    使用道具 举报

    0

    主题

    3

    听众

    41

    积分

    升级  37.89%

    该用户从未签到

    自我介绍
    200 字节以内

    不支持自定义 Discuz! 代码
    回复

    使用道具 举报

    11

    主题

    6

    听众

    2308

    积分

    升级  10.27%

  • TA的每日心情
    慵懒
    2015-6-9 22:13
  • 签到天数: 155 天

    [LV.7]常住居民III

    社区QQ达人 邮箱绑定达人 发帖功臣

    群组2012第三期美赛培训

    群组学术交流A

    群组学术交流B

    数模 学数学的学生的必经之路54766852922954565382463340642130847245518262255267242759721895109967713933980608
    哈哈
    回复

    使用道具 举报

    您需要登录后才可以回帖 登录 | 注册地址

    qq
    收缩
    • 电话咨询

    • 04714969085
    fastpost

    关于我们| 联系我们| 诚征英才| 对外合作| 产品服务| QQ

    手机版|Archiver| |繁體中文 手机客户端  

    蒙公网安备 15010502000194号

    Powered by Discuz! X2.5   © 2001-2013 数学建模网-数学中国 ( 蒙ICP备14002410号-3 蒙BBS备-0002号 )     论坛法律顾问:王兆丰

    GMT+8, 2025-7-11 00:16 , Processed in 0.620257 second(s), 84 queries .

    回顶部