Hey experts,
I have to write some classes doing communications with a device
controlled via RS 232. Everthing is working well, but the data the
device is sending back is encrypted.
As I have found out today, the firmware is using algorithms which are
compatible to the algorithms created by Eric Yound and Tim Hudson a
couple of years ago.
I have studied DESCryptoServic eProvider and found, that handling of
this provider is very easy. The device is using easy ECB encryption
and the decryption should be just a few lines of code.
The problem: I just know a string (char) phrase which is used by the
device to generate a key, for example "12345678".
Is there ANYONE in the univers, who knows the code of Eric Young and
Tim Hudson (probably themselves - email addresses in source are not
correct anymore) and can help me using DESCryptoServic eProvider with
my string phrase to decrypt information of the device (in CSharp c#)
??
Folks, I am not trying to crack anything - the device is just a few
years old and theres nobody left to help me working with it.
Thanks for any info which could help me researching or solving.
Mr. Nicolas Paladino - probably you know any further infos ??
THANKS.
Tom
2  3662 
"Tom" <ts@ck-de.net> wrote in message
news:2f******** *************** ***@posting.goo gle.com... Hey experts,
I have to write some classes doing communications with a device
controlled via RS 232. Everthing is working well, but the data the
device is sending back is encrypted.
As I have found out today, the firmware is using algorithms which are
compatible to the algorithms created by Eric Yound and Tim Hudson a
couple of years ago.
I have studied DESCryptoServic eProvider and found, that handling of
this provider is very easy. The device is using easy ECB encryption
and the decryption should be just a few lines of code.
The problem: I just know a string (char) phrase which is used by the
device to generate a key, for example "12345678".
Is there ANYONE in the univers, who knows the code of Eric Young and
Tim Hudson (probably themselves - email addresses in source are not
correct anymore) and can help me using DESCryptoServic eProvider with
my string phrase to decrypt information of the device (in CSharp c#)
??
Folks, I am not trying to crack anything - the device is just a few
years old and theres nobody left to help me working with it.
Thanks for any info which could help me researching or solving.
Mr. Nicolas Paladino - probably you know any further infos ??
THANKS.
Tom
I think you can find Tim's email address here: http://www2.psy.uq.edu.au/~ftp/Crypto/
/Fredrik
Frederik,
thanks for the information but the mailadress given on that site is
not valid anymore (I#ve tried to post a message)- cryptosoft.com
domain does not really exist.
I think my prolbem is not really a problem, but a misunderstandin g:
If I geive an 8 byte key to DESCryptoServic eProvider(), the provider
will calculate all necessary schedules and it will work correct - this
is why I could not find any key generator -> it is not needed !
This problem is now SOLVED - it did not exist (only in my head).
Thanks for any comments.
Tom
"Fredrik Wahlgren" <fr************ ****@mailbox.sw ipnet.se> wrote in message news:<#0******* *******@TK2MSFT NGP09.phx.gbl>. .. "Tom" <ts@ck-de.net> wrote in message
news:2f******** *************** ***@posting.goo gle.com... Hey experts,
I have to write some classes doing communications with a device
controlled via RS 232. Everthing is working well, but the data the
device is sending back is encrypted.
As I have found out today, the firmware is using algorithms which are
compatible to the algorithms created by Eric Yound and Tim Hudson a
couple of years ago.
I have studied DESCryptoServic eProvider and found, that handling of
this provider is very easy. The device is using easy ECB encryption
and the decryption should be just a few lines of code.
The problem: I just know a string (char) phrase which is used by the
device to generate a key, for example "12345678".
Is there ANYONE in the univers, who knows the code of Eric Young and
Tim Hudson (probably themselves - email addresses in source are not
correct anymore) and can help me using DESCryptoServic eProvider with
my string phrase to decrypt information of the device (in CSharp c#)
??
Folks, I am not trying to crack anything - the device is just a few
years old and theres nobody left to help me working with it.
Thanks for any info which could help me researching or solving.
Mr. Nicolas Paladino - probably you know any further infos ??
THANKS.
Tom
I think you can find Tim's email address here:
http://www2.psy.uq.edu.au/~ftp/Crypto/
/Fredrik This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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