tag:blogger.com,1999:blog-6767898351325918278.post7310890487880669607..comments2017-02-04T13:34:11.647+08:00Comments on John Ahlgren: How to Crack Door Codes and Suitcases FastJohn Ahlgrenhttps://plus.google.com/109378830052365013943noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-6767898351325918278.post-4926790939612994882016-02-11T16:18:04.925+08:002016-02-11T16:18:04.925+08:00Great writingGreat writingMark W.http://www.blogger.com/profile/11284906977297300197noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-72747417397047395702016-02-06T19:01:38.329+08:002016-02-06T19:01:38.329+08:00niceniceJesica Smithhttp://www.blogger.com/profile/18230825116957516712noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-28337380112295453672016-01-01T17:51:59.608+08:002016-01-01T17:51:59.608+08:00Thanks a lot!!!Thanks a lot!!!роман служебныйhttp://www.blogger.com/profile/16829339751213432206noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-73491001811923780092015-05-02T04:51:32.246+08:002015-05-02T04:51:32.246+08:00Thanks for letting me know, it's been fixed no...Thanks for letting me know, it's been fixed now.John Ahlgrenhttp://www.blogger.com/profile/10214801661943672953noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-18945215273264762562015-05-01T00:52:58.393+08:002015-05-01T00:52:58.393+08:00Great post. Thanks a lot.
I am not sure if you ar...Great post. Thanks a lot.<br /><br />I am not sure if you are still active in this blog, but the link to the figure in this post is broken. Zong-Xiao Hehttp://www.blogger.com/profile/12978977767771796773noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-2744934366886635472013-11-16T13:09:31.895+08:002013-11-16T13:09:31.895+08:001. The problem as presented above assumes you know...1. The problem as presented above assumes you know the length. <br /><br />If you don't anything about the length, you can't use this method. The problem is that after inserting 100 digits, you still don't know if you've even tried a single code or not. So solving it by conventional means is also problematic: if we always want to start with the code consisting of 0's, we don't know where to stop.<br /><br />But if you assume that you know an upper bound N, then trying all codes of length N will automatically also try all codes of any length smaller than N (since they are all contained within the length N codes).<br /><br />2. You have to compute a De Bruijn sequence. If the lock uses all the inputs you listed, that k=16. Normally, a lock does not use the * and # for codes, in which case k=14. If they only use 0-9, then k=10.<br /><br />This algorithm will construct a De Bruijn sequence without constructing any graphs:<br />http://en.wikipedia.org/wiki/De_Bruijn_sequence#Algorithm<br />John Ahlgrenhttp://www.blogger.com/profile/10214801661943672953noreply@blogger.comtag:blogger.com,1999:blog-6767898351325918278.post-55806673365572221602013-11-15T17:34:30.956+08:002013-11-15T17:34:30.956+08:00ive got an assignment to crack the keyless digital...ive got an assignment to crack the keyless digital door lock,i read the post and understood most of the thing but to start with my assignment i have a few questions<br /><br />1. how do i know the length of the password to that lock? <br />2. what combinations i have to start with and in which order?<br /><br />the lock has following inputs "a, b, c, d 0-9, *,#"<br /><br />thanksWaqas Manzoorhttp://www.blogger.com/profile/17647281161307972721noreply@blogger.com