Your machine/account is identified by a file in the steam directory. The file is called a "sentry file" and it's name is in the form of ssfn<numbers>. The steam client provides a sha1 hash of this file at logon, and the back-end confirms the validity of it.
Deleting the file would require you to enter another email auth code, and Steam will generate another sentry file. You cannot log into a SG enabled account without either the sentry file belonging to the account or the email auth code. On Sun, Jan 22, 2012 at 2:18 PM, ics <i...@ics-base.net> wrote: > I don't know what they did but i used to get a lot of promps about > entering the code delivered to my e-mail in order to log in previously. I > haven't seen that dialog for months. > > I also know that the thing leaves some sort of imprint to the machine > itself but ip-changes especially did this prompt for me. > > -ics > > 22.1.2012 22:03, javato...@yahoo.es kirjoitti: > > As far as i know steam guard check the computer, not ip. Maybe im wrong >> but i was never blocked because of a ip change. >> >>> I agree, but there seems to be a lot of users with dialups who'se ip's >>> change all the time and they previously posted on the forums and complained >>> a lot about it. Perhaps this led to decision to lighten Steam Guard >>> settings or features. >>> >>> Atleast Valve added craft recepies for the xmas weapons for TF2 after >>> considerable whine on SPUF TF2 section and suddenly the recepies were >>> added, leaving the much older recepies off and not added. >>> >>> This proves that Valve listens and reads the forums but the decisions >>> are not always what they should be. Small minority seems to be making too >>> much noise there and affecting decisions. >>> >>> -ics >>> >>> 22.1.2012 21:33, javato...@yahoo.es kirjoitti: >>> >>>> I think steam guard should be on ALWAYS, theres no point to disable it. >>>> It just take 2 minutes to enable a new computer so shoulnt be an option to >>>> be able to disable it. Just my opinion... >>>> >>>>> SteamGuard can be disabled entirely from a trusted computer without >>>>> *any* notification or hassle. >>>>> Don't like this. >>>>> >>>>> On Sun, Jan 22, 2012 at 7:06 PM, Mart-Jan Reeuwijk<mreeu...@yahoo.com> >>>>> wrote: >>>>> >>>>>> hmm, I do have hope they mean with that the SteamGuard protected >>>>>> account in >>>>>> question. And it DOES send a mail.... after, to notify you of the >>>>>> change and a link to steam support, see below: >>>>>> >>>>>> ==============================**== >>>>>> >>>>>> >>>>>> >>>>>> Dear<snip>, >>>>>> >>>>>> This email message confirms that your Steam account contact email >>>>>> address has been successfully changed. >>>>>> We are sending this notice to ensure the privacy and security of your >>>>>> Steam account. If you authorized this change, no further action is >>>>>> necessary. If you did not authorize this change, or if you need >>>>>> additional help with your account, please follow this link to the >>>>>> Steam >>>>>> Support site and submit a request for assistance: >>>>>> >>>>>> http://support.steampowered. com/cgi-bin/steampowered.cfg/ >>>>>> php/enduser/std_adp.php?p_ faqid=197 >>>>>> Thanks for reviewing this information and helping us to maintain the >>>>>> privacy and security of your account. >>>>>> >>>>>> The Steam Support Team >>>>>> http://www.steampowered.com >>>>>> ==============================**======= >>>>>> I'd be against any "easy" like this. >>>>>> >>>>>> >>>>>> Maybe implement a "panic" button, where the old login info can be >>>>>> used for x >>>>>> time (3 days or some) after it got changed, and then the account can >>>>>> be >>>>>> locked with this by the real owner, only undoable by a support ticket. >>>>>> >>>>>> >>>>>> >>>>>> ______________________________**__ >>>>>>> From: Ryan Stecker<voidedwea...@gmail.com**> >>>>>>> To: Mart-Jan Reeuwijk<mreeu...@yahoo.com>; Half-Life dedicated >>>>>>> Linux server mailing >>>>>>> list<hlds_linux@list.**valvesoftware.com<hlds_linux@list.valvesoftware.com> >>>>>>> > >>>>>>> Sent: Sunday, 22 January 2012, 17:53 >>>>>>> Subject: Re: [hlds_linux] Another high profile trader/admin hijacked. >>>>>>> >>>>>>> >>>>>>> There was a recent feature addition to steam that allows email >>>>>>> changes without confirmation for trusted computers. >>>>>>> >>>>>>> http://store.steampowered.com/**news/7114/<http://store.steampowered.com/news/7114/> >>>>>>> >>>>>>> I believe "trusted computer" in that sense means any account with SG >>>>>>> enabled and authenticated. That would make it a quite frightening >>>>>>> change, >>>>>>> and I believe email confirmation should always be required. >>>>>>> >>>>>>> It may be possible he fell victim to this. >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Sun, Jan 22, 2012 at 10:17 AM, Mart-Jan Reeuwijk< >>>>>>> mreeu...@yahoo.com> wrote: >>>>>>> >>>>>>> I can confirm that he is: >>>>>>> >>>>>>>> - Author on EventScripts >>>>>>>> - Admin on SteamRep.com >>>>>>>> - Reddit Admin "thorax" >>>>>>>> >>>>>>>> - And I did have a "slowchat" with him on a private section of a >>>>>>>> forum. He confirmed to me and others there that the security he listed >>>>>>>> there was as how he runs it. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Quote from him from that forum's private section: >>>>>>>> I have to go to bed, but you can see my security precautions here: >>>>>>>> http://www.reddit.com/r/**tf2trade/comments/orbjk/iama_** >>>>>>>> mattie_fellow_with_the_**largest_unusual_tc/<http://www.reddit.com/r/tf2trade/comments/orbjk/iama_mattie_fellow_with_the_largest_unusual_tc/> >>>>>>>> >>>>>>>> My password policy was numbers, letters, spaces, upper-case >>>>>>>> letters, but only 9 characters on Steam. >>>>>>>> >>>>>>>> My passwords are different everywhere. He somehow disabled >>>>>>>> SteamGuard, probably remotely. >>>>>>>> >>>>>>>> If you recall, I helped datastorm review that hijack avoidance >>>>>>>> document. You pretty much don't get more paranoid than me. I run 3 >>>>>>>> types of >>>>>>>> malware detection and use Process Explorer multiple times a day to >>>>>>>> look >>>>>>>> for any unsigned processes running to identify exactly what they >>>>>>>> are. >>>>>>>> >>>>>>>> Whatever this hijacker's attack is, it's not something common and >>>>>>>> not >>>>>>>> something that we have good explicit tips for people to avoid. I'll >>>>>>>> continue brainstorming tomorrow >>>>>>>> >>>>>>>> *snip non relevant* >>>>>>>> >>>>>>>> As I may have mentioned, he told multiple people that he targetted >>>>>>>> me >>>>>>>> specifically because I tried to stop so many of the latest hijacks >>>>>>>> and >>>>>>>> because I gave people tips to stop hijackings (especially double >>>>>>>> hijackings). I'm sure money had something to do with it, too, but he >>>>>>>> told my wife he did it for the challenge. Well, he won. >>>>>>>> >>>>>>>> [/Quote] >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Shame that his collection with regaining the account will be duped, >>>>>>>> and therefore be worth a lot less. Also a pain that SteamGuard isn't >>>>>>>> the >>>>>>>> rigid security I'd hoped for >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ______________________________**__ >>>>>>>>> From: ics<i...@ics-base.net> >>>>>>>>> To: Half-Life dedicated Linux server mailing list<hlds_linux@list. >>>>>>>>> **valvesoftware.com <hlds_linux@list.valvesoftware.com>> >>>>>>>>> Sent: Sunday, 22 January 2012, 16:11 >>>>>>>>> Subject: Re: [hlds_linux] Another high profile trader/admin >>>>>>>>> hijacked. >>>>>>>>> >>>>>>>>> Thats a bit of interesting thing in any case anyway, as if that's >>>>>>>>> really the Mattie and he did have security in order listed on reddit >>>>>>>>> and >>>>>>>>> still was hacked, then does Steam has security issues again (forums >>>>>>>>> anyone)? Steamguard ineffective? Interesting to see if he had the >>>>>>>>> fault or >>>>>>>>> Steam. >>>>>>>>> >>>>>>>>> -ics >>>>>>>>> >>>>>>>>> 22.1.2012 16:43, Yuki kirjoitti: >>>>>>>>> >>>>>>>>>> Correct! However, sorry to burst your bubble, but technically >>>>>>>>>> this is Source server administration related. >>>>>>>>>> http://mattie.net/cs/ >>>>>>>>>> While it may be on a tangent, there's no need to blacklist a >>>>>>>>>> topic like this from the list! >>>>>>>>>> >>>>>>>>>> On 22/01/2012 14:39, Alex Kowald wrote: >>>>>>>>>> >>>>>>>>>>> This mailing list is for source server administration related >>>>>>>>>>> topics. >>>>>>>>>>> >>>>>>>>>>> On Sun, Jan 22, 2012 at 8:31 AM, Mart-Jan Reeuwijk< >>>>>>>>>>> mreeu...@yahoo.com> wrote: >>>>>>>>>>> >>>>>>>>>>>> another high profile trader admin hijacked: >>>>>>>>>>>> >>>>>>>>>>>> http://www.reddit.com/r/**tf2trade/comments/orbjk/iama_** >>>>>>>>>>>> mattie_fellow_with_the_**largest_unusual_tc/<http://www.reddit.com/r/tf2trade/comments/orbjk/iama_mattie_fellow_with_the_largest_unusual_tc/> >>>>>>>>>>>> >>>>>>>>>>>> steamID: Mattie! (busy - sorry) >>>>>>>>>>>> steamID32: STEAM_0:0:5712733 >>>>>>>>>>>> steamID64: http://steamcommunity.com/** >>>>>>>>>>>> profiles/76561197971691194<http://steamcommunity.com/profiles/76561197971691194> >>>>>>>>>>>> customURL: >>>>>>>>>>>> steamrepURL: http://www.steamrep.com/index.** >>>>>>>>>>>> php?id=76561197971691194<http://www.steamrep.com/index.php?id=76561197971691194> >>>>>>>>>>>> ______________________________**_________________ >>>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>>>>>>>> archives, please visit: >>>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>>>>>>>> >>>>>>>>>>> ______________________________**_________________ >>>>>>>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>>>>>>> archives, please visit: >>>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> ______________________________**_________________ >>>>>>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>>>>>> archives, please visit: >>>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>>>>>> >>>>>>>>> >>>>>>>>> ______________________________**_________________ >>>>>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>>>>> archives, please visit: >>>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> ______________________________**_________________ >>>>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>>>> archives, please visit: >>>>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> ______________________________**_________________ >>>>>> To unsubscribe, edit your list preferences, or view the list >>>>>> archives, please visit: >>>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/** >>>>>> hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>>> >>>>> ______________________________**_________________ >>>>> To unsubscribe, edit your list preferences, or view the list archives, >>>>> please visit: >>>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>>> >>>>> >>>> >>>> ______________________________**_________________ >>>> To unsubscribe, edit your list preferences, or view the list archives, >>>> please visit: >>>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>>> >>> >>> >>> ______________________________**_________________ >>> To unsubscribe, edit your list preferences, or view the list archives, >>> please visit: >>> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >>> >>> >> >> ______________________________**_________________ >> To unsubscribe, edit your list preferences, or view the list archives, >> please visit: >> https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> >> > > > ______________________________**_________________ > To unsubscribe, edit your list preferences, or view the list archives, > please visit: > https://list.valvesoftware.**com/cgi-bin/mailman/listinfo/**hlds_linux<https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux> > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux
