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Unique Machine Identifierfind a good site which summarises the methods possible in vb .net. I am after a way of producing a unique serial number for my app. The program would produce a unique identifier for the computer, then I would psovide the user with a serial number unique to their machine. In other words I would like to check for things like: i) Hard disk (not volume) serial number ii) CPU serial number iii) Video card serial number (?) (iv) Any other unique number I could use. The program will be using vb. net 2003 (.net 1.1) and will only be run on Windows 2000 and XP. I realise there may be commercial solutions out there, but I am only a poor programmer and would like to save money and do it myself. If there is anywhere you can point me to in order to get started on this, please, please reply to this post. JJ OK so on further reading, it seems there is no reliable way to get hardware
serial numbers (correct me if I am wrong). Some programmers have suggested one of the two methods: (a) generate a randon number (with a checksum etc) that is something to do with the date. This is presented to the user. The user MUST then call the help desk, and give them this number. The help desk then use a decoder to provide a one time only use key (b) generate a unique number that is something to do with the date and MAC address of the NIC (or the virtual NIC used by dial up networking). Use this as a seed for a Luhn-Mod checksum to produce a unique serial number. Can anyone comment as to whether I am heading down the right lines? I think I prefer option (a) as it seems slightly simpler and probably more reliable...? Thanks JJ Show quoteHide quote "JJ" <a**@xyz.com> wrote in message news:OK%236K2vVGHA.1868@TK2MSFTNGP09.phx.gbl... > Now I know this question has been asked many times, but I cannot seem to > find a good site which summarises the methods possible in vb .net. > > I am after a way of producing a unique serial number for my app. The > program would produce a unique identifier for the computer, then I would > psovide the user with a serial number unique to their machine. > > In other words I would like to check for things like: > i) Hard disk (not volume) serial number > ii) CPU serial number > iii) Video card serial number (?) > (iv) Any other unique number I could use. > > The program will be using vb. net 2003 (.net 1.1) and will only be run on > Windows 2000 and XP. > > I realise there may be commercial solutions out there, but I am only a > poor programmer and would like to save money and do it myself. > > If there is anywhere you can point me to in order to get started on this, > please, please reply to this post. > > JJ > > Hi,
The CPU's id is not always available. Windows Serial Number http://www.vb-tips.com/default.aspx?ID=e917970f-ce91-4adf-87fb-6d3050562a04 Ken --------------- Show quoteHide quote "JJ" <a**@xyz.com> wrote in message news:OK%236K2vVGHA.1868@TK2MSFTNGP09.phx.gbl... > Now I know this question has been asked many times, but I cannot seem to > find a good site which summarises the methods possible in vb .net. > > I am after a way of producing a unique serial number for my app. The > program would produce a unique identifier for the computer, then I would > psovide the user with a serial number unique to their machine. > > In other words I would like to check for things like: > i) Hard disk (not volume) serial number > ii) CPU serial number > iii) Video card serial number (?) > (iv) Any other unique number I could use. > > The program will be using vb. net 2003 (.net 1.1) and will only be run on > Windows 2000 and XP. > > I realise there may be commercial solutions out there, but I am only a > poor programmer and would like to save money and do it myself. > > If there is anywhere you can point me to in order to get started on this, > please, please reply to this post. > > JJ > > "JJ" <a**@xyz.com> schrieb: (v) The machine's SID:> Now I know this question has been asked many times, but I cannot seem to > find a good site which summarises the methods possible in vb .net. > > I am after a way of producing a unique serial number for my app. The > program would produce a unique identifier for the computer, then I would > psovide the user with a serial number unique to their machine. > > In other words I would like to check for things like: > i) Hard disk (not volume) serial number > ii) CPU serial number > iii) Video card serial number (?) > (iv) Any other unique number I could use. <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> -- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/> I've managed to get the serial numbers I want to use (namely the windows
serial and the computer SID. Now I am looking to be able to encrypt the numbers into a fixed size serial number that my program can authenticate. I guess this means using something like MD5 and getting my prog to check the checksum? Can anyone help here? Perhaps point me int he right direction? Thanks JJ Show quoteHide quote "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... > "JJ" <a**@xyz.com> schrieb: >> Now I know this question has been asked many times, but I cannot seem to >> find a good site which summarises the methods possible in vb .net. >> >> I am after a way of producing a unique serial number for my app. The >> program would produce a unique identifier for the computer, then I would >> psovide the user with a serial number unique to their machine. >> >> In other words I would like to check for things like: >> i) Hard disk (not volume) serial number >> ii) CPU serial number >> iii) Video card serial number (?) >> (iv) Any other unique number I could use. > > (v) The machine's SID: > > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> > > -- > M S Herfried K. Wagner > M V P <URL:http://dotnet.mvps.org/> > V B <URL:http://classicvb.org/petition/> Have you looked as generating a GUID from your serial nos?
-- Show quoteHide quoteDennis in Houston "JJ" wrote: > I've managed to get the serial numbers I want to use (namely the windows > serial and the computer SID. Now I am looking to be able to encrypt the > numbers into a fixed size serial number that my program can authenticate. > > I guess this means using something like MD5 and getting my prog to check the > checksum? > > Can anyone help here? Perhaps point me int he right direction? > > Thanks JJ > > > > "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message > news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... > > "JJ" <a**@xyz.com> schrieb: > >> Now I know this question has been asked many times, but I cannot seem to > >> find a good site which summarises the methods possible in vb .net. > >> > >> I am after a way of producing a unique serial number for my app. The > >> program would produce a unique identifier for the computer, then I would > >> psovide the user with a serial number unique to their machine. > >> > >> In other words I would like to check for things like: > >> i) Hard disk (not volume) serial number > >> ii) CPU serial number > >> iii) Video card serial number (?) > >> (iv) Any other unique number I could use. > > > > (v) The machine's SID: > > > > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> > > > > -- > > M S Herfried K. Wagner > > M V P <URL:http://dotnet.mvps.org/> > > V B <URL:http://classicvb.org/petition/> > > > Hi Dennis.
I have collected the: Windows serial number; Computer SID; Disk (volume) serial number; Motherboard serial number. I was hoping that someone would have a nice bit of code that allows you to plug in a load of numbers and come out with a nice neat 32 digit (for example) serial number using some complicated algorithm. that my prog could verify. (I realise that not all of these serial number may be available on all machines, so my methods must allow for perhaps any two of these being preset.) I am not so good at the maths so would appreciate if anyone can point me in a direction that may help. TIA, JJ Show quoteHide quote "Dennis" <Den***@discussions.microsoft.com> wrote in message news:409C0760-0EEC-451D-8A3D-BDA19A47F9A0@microsoft.com... > Have you looked as generating a GUID from your serial nos? > -- > Dennis in Houston > > > "JJ" wrote: > >> I've managed to get the serial numbers I want to use (namely the windows >> serial and the computer SID. Now I am looking to be able to encrypt the >> numbers into a fixed size serial number that my program can authenticate. >> >> I guess this means using something like MD5 and getting my prog to check >> the >> checksum? >> >> Can anyone help here? Perhaps point me int he right direction? >> >> Thanks JJ >> >> >> >> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message >> news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... >> > "JJ" <a**@xyz.com> schrieb: >> >> Now I know this question has been asked many times, but I cannot seem >> >> to >> >> find a good site which summarises the methods possible in vb .net. >> >> >> >> I am after a way of producing a unique serial number for my app. The >> >> program would produce a unique identifier for the computer, then I >> >> would >> >> psovide the user with a serial number unique to their machine. >> >> >> >> In other words I would like to check for things like: >> >> i) Hard disk (not volume) serial number >> >> ii) CPU serial number >> >> iii) Video card serial number (?) >> >> (iv) Any other unique number I could use. >> > >> > (v) The machine's SID: >> > >> > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> >> > >> > -- >> > M S Herfried K. Wagner >> > M V P <URL:http://dotnet.mvps.org/> >> > V B <URL:http://classicvb.org/petition/> >> >> >> JJ,
If you take so much don't forget the Mac address which is on a network adapter. If it is there than it almost for sure unique. Be aware that this kind of methods have finished software companies. Cor Show quoteHide quote "JJ" <a**@xyz.com> schreef in bericht news:erH3g27VGHA.5044@TK2MSFTNGP09.phx.gbl... > Hi Dennis. > > I have collected the: > Windows serial number; > Computer SID; > Disk (volume) serial number; > Motherboard serial number. > > I was hoping that someone would have a nice bit of code that allows you to > plug in a load of numbers and come out with a nice neat 32 digit (for > example) serial number using some complicated algorithm. > that my prog could verify. (I realise that not all of these serial number > may be available on all machines, so my methods must allow for perhaps > any two of these being preset.) > > I am not so good at the maths so would appreciate if anyone can point me > in a direction that may help. > > TIA, > > JJ > > > "Dennis" <Den***@discussions.microsoft.com> wrote in message > news:409C0760-0EEC-451D-8A3D-BDA19A47F9A0@microsoft.com... >> Have you looked as generating a GUID from your serial nos? >> -- >> Dennis in Houston >> >> >> "JJ" wrote: >> >>> I've managed to get the serial numbers I want to use (namely the windows >>> serial and the computer SID. Now I am looking to be able to encrypt the >>> numbers into a fixed size serial number that my program can >>> authenticate. >>> >>> I guess this means using something like MD5 and getting my prog to check >>> the >>> checksum? >>> >>> Can anyone help here? Perhaps point me int he right direction? >>> >>> Thanks JJ >>> >>> >>> >>> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message >>> news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... >>> > "JJ" <a**@xyz.com> schrieb: >>> >> Now I know this question has been asked many times, but I cannot seem >>> >> to >>> >> find a good site which summarises the methods possible in vb .net. >>> >> >>> >> I am after a way of producing a unique serial number for my app. The >>> >> program would produce a unique identifier for the computer, then I >>> >> would >>> >> psovide the user with a serial number unique to their machine. >>> >> >>> >> In other words I would like to check for things like: >>> >> i) Hard disk (not volume) serial number >>> >> ii) CPU serial number >>> >> iii) Video card serial number (?) >>> >> (iv) Any other unique number I could use. >>> > >>> > (v) The machine's SID: >>> > >>> > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> >>> > >>> > -- >>> > M S Herfried K. Wagner >>> > M V P <URL:http://dotnet.mvps.org/> >>> > V B <URL:http://classicvb.org/petition/> >>> >>> >>> > > Hi Cor.
What do you mean by : "> Be aware that this kind of methods have finished software companies. " Do you mean that these methods are a pain for end users? Thanks, JJ Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:OdCNoD8VGHA.1764@TK2MSFTNGP11.phx.gbl... > JJ, > > If you take so much don't forget the Mac address which is on a network > adapter. > If it is there than it almost for sure unique. > > Be aware that this kind of methods have finished software companies. > > Cor > > "JJ" <a**@xyz.com> schreef in bericht > news:erH3g27VGHA.5044@TK2MSFTNGP09.phx.gbl... >> Hi Dennis. >> >> I have collected the: >> Windows serial number; >> Computer SID; >> Disk (volume) serial number; >> Motherboard serial number. >> >> I was hoping that someone would have a nice bit of code that allows you >> to plug in a load of numbers and come out with a nice neat 32 digit (for >> example) serial number using some complicated algorithm. >> that my prog could verify. (I realise that not all of these serial number >> may be available on all machines, so my methods must allow for perhaps >> any two of these being preset.) >> >> I am not so good at the maths so would appreciate if anyone can point me >> in a direction that may help. >> >> TIA, >> >> JJ >> >> >> "Dennis" <Den***@discussions.microsoft.com> wrote in message >> news:409C0760-0EEC-451D-8A3D-BDA19A47F9A0@microsoft.com... >>> Have you looked as generating a GUID from your serial nos? >>> -- >>> Dennis in Houston >>> >>> >>> "JJ" wrote: >>> >>>> I've managed to get the serial numbers I want to use (namely the >>>> windows >>>> serial and the computer SID. Now I am looking to be able to encrypt the >>>> numbers into a fixed size serial number that my program can >>>> authenticate. >>>> >>>> I guess this means using something like MD5 and getting my prog to >>>> check the >>>> checksum? >>>> >>>> Can anyone help here? Perhaps point me int he right direction? >>>> >>>> Thanks JJ >>>> >>>> >>>> >>>> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message >>>> news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... >>>> > "JJ" <a**@xyz.com> schrieb: >>>> >> Now I know this question has been asked many times, but I cannot >>>> >> seem to >>>> >> find a good site which summarises the methods possible in vb .net. >>>> >> >>>> >> I am after a way of producing a unique serial number for my app. The >>>> >> program would produce a unique identifier for the computer, then I >>>> >> would >>>> >> psovide the user with a serial number unique to their machine. >>>> >> >>>> >> In other words I would like to check for things like: >>>> >> i) Hard disk (not volume) serial number >>>> >> ii) CPU serial number >>>> >> iii) Video card serial number (?) >>>> >> (iv) Any other unique number I could use. >>>> > >>>> > (v) The machine's SID: >>>> > >>>> > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> >>>> > >>>> > -- >>>> > M S Herfried K. Wagner >>>> > M V P <URL:http://dotnet.mvps.org/> >>>> > V B <URL:http://classicvb.org/petition/> >>>> >>>> >>>> >> >> > > > Yes especially as they can not reach you, they have to change a computer > Do you mean that these methods are a pain for end users? > part and they need to have a result the next day. Cor I understand as I've been there.
However this software is a time limited software for a specific project, and I want to tie it to the client and stop any possible use in the future, and on other machines. Thanks, JJ Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:ekiBAV8VGHA.4328@TK2MSFTNGP12.phx.gbl... > > >> Do you mean that these methods are a pain for end users? >> > Yes especially as they can not reach you, they have to change a computer > part and they need to have a result the next day. > > Cor > JJ wrote:
> However this software is a time limited software for a specific To help tie it to the client, you could have their name boldly displayed > project, and I want to tie it to the client and stop any possible use > in the future, and on other machines. throughout it - "For the exclusive use of XYZ Corp" - which would hopefully disuade other companies from using it. As to the time limitation, just check the date when your program starts and every now and again whilst it's running; yes, they could change the date on their computer, but that tends to mess up other things too. Andrew Hi Andrew.
Yes I've got their logo all over it. Though maybe you're right about making it a little more 'legal' looking with a "For the exclusive use of...' note. I've managed to combat the time limitation by use of the licensemanager and a few discreet registry keys inserted on install. I am hoping the additional serial number strategy will help me with other projects too though, so I still want to include it. Thanks, JJ Show quoteHide quote "Andrew Morton" <a**@in-press.co.uk.invalid> wrote in message news:%23aTXNx8VGHA.2444@TK2MSFTNGP14.phx.gbl... > JJ wrote: >> However this software is a time limited software for a specific >> project, and I want to tie it to the client and stop any possible use >> in the future, and on other machines. > > To help tie it to the client, you could have their name boldly displayed > throughout it - "For the exclusive use of XYZ Corp" - which would > hopefully disuade other companies from using it. As to the time > limitation, just check the date when your program starts and every now and > again whilst it's running; yes, they could change the date on their > computer, but that tends to mess up other things too. > > Andrew > JJ wrote:
<snip serial number linked to one machine woes> Thinking about it, if you distrust a customer so much that you'll go to such extensive and unreliable lengths in an attempt to protect your software, do you really want to being doing business with them? Andrew -- That's why I love VoIP. You don't get people phoning up to complain that the network is down. -- Peter Corlett, in the Monastery Good point. I do actually have some trust for them, but who knows how
desperate I may get in the future, and who therefore I may have to provide my software to..... I thought though that it was a pretty reliable method to get the windows serial number, and the Windows SID? Am I wrong? I understand that the hardware serial numbers may be a little more unreliable, but please do tell me if I am wrong in my above statement. Thanks, JJ Show quoteHide quote "Andrew Morton" <a**@in-press.co.uk.invalid> wrote in message news:%23j8KW3%23VGHA.4720@TK2MSFTNGP15.phx.gbl... > JJ wrote: > <snip serial number linked to one machine woes> > > Thinking about it, if you distrust a customer so much that you'll go to > such extensive and unreliable lengths in an attempt to protect your > software, do you really want to being doing business with them? > > Andrew > > -- > That's why I love VoIP. You don't get people phoning up to complain that > the > network is down. > -- Peter Corlett, in the Monastery > JJ wrote:
> I thought though that it was a pretty reliable method to get the If you're the one providing the serial number generated from data from a > windows serial number, and the Windows SID? Am I wrong? machine, you have to make sure that the serial number can be obtained at any time... 02:30 on a Sunday, the middle of your holiday, whenever. And if it's automatically generated (e.g. through a web site) you have to make sure that generator is always available, and has 24 hour phone support. Remember that Murphy's law works every second of every day... Andrew Hi Andrew.
Yes I've got their logo all over it. Though maybe you're right about making it a little more 'legal' looking with a "For the exclusive use of...' note. I've managed to combat the time limitation by use of the licensemanager and a few registry keys inserted on install. I am hoping the additional serial number strategy will help me with other projects too though, so I still want to include it. Thanks, JJ Show quoteHide quote "Andrew Morton" <a**@in-press.co.uk.invalid> wrote in message news:%23aTXNx8VGHA.2444@TK2MSFTNGP14.phx.gbl... > JJ wrote: >> However this software is a time limited software for a specific >> project, and I want to tie it to the client and stop any possible use >> in the future, and on other machines. > > To help tie it to the client, you could have their name boldly displayed > throughout it - "For the exclusive use of XYZ Corp" - which would > hopefully disuade other companies from using it. As to the time > limitation, just check the date when your program starts and every now and > again whilst it's running; yes, they could change the date on their > computer, but that tends to mess up other things too. > > Andrew > Wow, replace the NIC one time and your app won't start anymore...
Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:OdCNoD8VGHA.1764@TK2MSFTNGP11.phx.gbl... > JJ, > > If you take so much don't forget the Mac address which is on a network > adapter. > If it is there than it almost for sure unique. > > Be aware that this kind of methods have finished software companies. > > Cor > > "JJ" <a**@xyz.com> schreef in bericht > news:erH3g27VGHA.5044@TK2MSFTNGP09.phx.gbl... >> Hi Dennis. >> >> I have collected the: >> Windows serial number; >> Computer SID; >> Disk (volume) serial number; >> Motherboard serial number. >> >> I was hoping that someone would have a nice bit of code that allows you >> to plug in a load of numbers and come out with a nice neat 32 digit (for >> example) serial number using some complicated algorithm. >> that my prog could verify. (I realise that not all of these serial number >> may be available on all machines, so my methods must allow for perhaps >> any two of these being preset.) >> >> I am not so good at the maths so would appreciate if anyone can point me >> in a direction that may help. >> >> TIA, >> >> JJ >> >> >> "Dennis" <Den***@discussions.microsoft.com> wrote in message >> news:409C0760-0EEC-451D-8A3D-BDA19A47F9A0@microsoft.com... >>> Have you looked as generating a GUID from your serial nos? >>> -- >>> Dennis in Houston >>> >>> >>> "JJ" wrote: >>> >>>> I've managed to get the serial numbers I want to use (namely the >>>> windows >>>> serial and the computer SID. Now I am looking to be able to encrypt the >>>> numbers into a fixed size serial number that my program can >>>> authenticate. >>>> >>>> I guess this means using something like MD5 and getting my prog to >>>> check the >>>> checksum? >>>> >>>> Can anyone help here? Perhaps point me int he right direction? >>>> >>>> Thanks JJ >>>> >>>> >>>> >>>> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message >>>> news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... >>>> > "JJ" <a**@xyz.com> schrieb: >>>> >> Now I know this question has been asked many times, but I cannot >>>> >> seem to >>>> >> find a good site which summarises the methods possible in vb .net. >>>> >> >>>> >> I am after a way of producing a unique serial number for my app. The >>>> >> program would produce a unique identifier for the computer, then I >>>> >> would >>>> >> psovide the user with a serial number unique to their machine. >>>> >> >>>> >> In other words I would like to check for things like: >>>> >> i) Hard disk (not volume) serial number >>>> >> ii) CPU serial number >>>> >> iii) Video card serial number (?) >>>> >> (iv) Any other unique number I could use. >>>> > >>>> > (v) The machine's SID: >>>> > >>>> > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> >>>> > >>>> > -- >>>> > M S Herfried K. Wagner >>>> > M V P <URL:http://dotnet.mvps.org/> >>>> > V B <URL:http://classicvb.org/petition/> >>>> >>>> >>>> >> >> > > Hi Martin - no that won't happen as I'll take a number of serial numbers and
allow the user to change a percentage of them. JJ Show quoteHide quote "Martin" <x@y.com> wrote in message news:uqlNtr9VGHA.5228@TK2MSFTNGP11.phx.gbl... > Wow, replace the NIC one time and your app won't start anymore... > > "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message > news:OdCNoD8VGHA.1764@TK2MSFTNGP11.phx.gbl... >> JJ, >> >> If you take so much don't forget the Mac address which is on a network >> adapter. >> If it is there than it almost for sure unique. >> >> Be aware that this kind of methods have finished software companies. >> >> Cor >> >> "JJ" <a**@xyz.com> schreef in bericht >> news:erH3g27VGHA.5044@TK2MSFTNGP09.phx.gbl... >>> Hi Dennis. >>> >>> I have collected the: >>> Windows serial number; >>> Computer SID; >>> Disk (volume) serial number; >>> Motherboard serial number. >>> >>> I was hoping that someone would have a nice bit of code that allows you >>> to plug in a load of numbers and come out with a nice neat 32 digit (for >>> example) serial number using some complicated algorithm. >>> that my prog could verify. (I realise that not all of these serial >>> number may be available on all machines, so my methods must allow for >>> perhaps any two of these being preset.) >>> >>> I am not so good at the maths so would appreciate if anyone can point me >>> in a direction that may help. >>> >>> TIA, >>> >>> JJ >>> >>> >>> "Dennis" <Den***@discussions.microsoft.com> wrote in message >>> news:409C0760-0EEC-451D-8A3D-BDA19A47F9A0@microsoft.com... >>>> Have you looked as generating a GUID from your serial nos? >>>> -- >>>> Dennis in Houston >>>> >>>> >>>> "JJ" wrote: >>>> >>>>> I've managed to get the serial numbers I want to use (namely the >>>>> windows >>>>> serial and the computer SID. Now I am looking to be able to encrypt >>>>> the >>>>> numbers into a fixed size serial number that my program can >>>>> authenticate. >>>>> >>>>> I guess this means using something like MD5 and getting my prog to >>>>> check the >>>>> checksum? >>>>> >>>>> Can anyone help here? Perhaps point me int he right direction? >>>>> >>>>> Thanks JJ >>>>> >>>>> >>>>> >>>>> "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message >>>>> news:%233IkgrwVGHA.5172@TK2MSFTNGP12.phx.gbl... >>>>> > "JJ" <a**@xyz.com> schrieb: >>>>> >> Now I know this question has been asked many times, but I cannot >>>>> >> seem to >>>>> >> find a good site which summarises the methods possible in vb .net. >>>>> >> >>>>> >> I am after a way of producing a unique serial number for my app. >>>>> >> The >>>>> >> program would produce a unique identifier for the computer, then I >>>>> >> would >>>>> >> psovide the user with a serial number unique to their machine. >>>>> >> >>>>> >> In other words I would like to check for things like: >>>>> >> i) Hard disk (not volume) serial number >>>>> >> ii) CPU serial number >>>>> >> iii) Video card serial number (?) >>>>> >> (iv) Any other unique number I could use. >>>>> > >>>>> > (v) The machine's SID: >>>>> > >>>>> > <URL:http://groups.google.de/group/microsoft.public.dotnet.languages.vb/browse_frm/thread/6c2803622a6bc9d2/7a4c404486381793> >>>>> > >>>>> > -- >>>>> > M S Herfried K. Wagner >>>>> > M V P <URL:http://dotnet.mvps.org/> >>>>> > V B <URL:http://classicvb.org/petition/> >>>>> >>>>> >>>>> >>> >>> >> >> > > 
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