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GeneralRe: updating to framework 3.0 Pin
Heath Stewart19-Feb-07 13:13
protectorHeath Stewart19-Feb-07 13:13 
GeneralRe: updating to framework 3.0 Pin
Dave Kreskowiak19-Feb-07 13:19
mveDave Kreskowiak19-Feb-07 13:19 
GeneralRe: updating to framework 3.0 Pin
Kevin McFarlane20-Feb-07 2:24
Kevin McFarlane20-Feb-07 2:24 
GeneralRe: updating to framework 3.0 Pin
Heath Stewart20-Feb-07 4:27
protectorHeath Stewart20-Feb-07 4:27 
GeneralRe: updating to framework 3.0 Pin
Kevin McFarlane20-Feb-07 8:44
Kevin McFarlane20-Feb-07 8:44 
AnswerRe: updating to framework 3.0 Pin
Thomas Stockwell19-Feb-07 7:05
professionalThomas Stockwell19-Feb-07 7:05 
GeneralRe: updating to framework 3.0 Pin
Darren Sim19-Feb-07 22:31
Darren Sim19-Feb-07 22:31 
QuestionMaking things secure enough to be cracked !!! Pin
fulbright18-Feb-07 19:17
fulbright18-Feb-07 19:17 
Hi,

Using pdflib library in C# I have created a pdf file which is
protected using owner password .Different options are disallowed like
print, copy contents etc. Things were working very fine untill i came
to know about some password crackers which could easily crack the
file , eliminating the password , thus making it possible for
operations like printing, copy etc .
The study showed that using user password as well will make the file
strong enough to be decrypted ,but "user password" is not a solution
in my case .

The code which actually creates a pdf file using pdflib is as under :

PDFLib obj = new PDFLib();
obj.begin_document(FileName, "masterpassword=23wdlm3ldjwld4w
permission={noprint}");

Now i wonder even that the file is encrypted using 128-bit
encryption , how a password cracker can retrieve that stored password
form the encrypted file .What operation is performed by the cracker to
remove the password and making the file accessible for all options .

Can any one please help me in this ....

Regards,

Madni

AnswerRe: Making things secure enough to be cracked !!! Pin
Dave Kreskowiak19-Feb-07 9:36
mveDave Kreskowiak19-Feb-07 9:36 
GeneralRe: Making things secure enough to be cracked !!! Pin
Heath Stewart19-Feb-07 13:26
protectorHeath Stewart19-Feb-07 13:26 
QuestionSystem Colours Pin
Simon P Stevens15-Feb-07 22:56
Simon P Stevens15-Feb-07 22:56 
AnswerRe: System Colours Pin
Thomas Stockwell16-Feb-07 18:45
professionalThomas Stockwell16-Feb-07 18:45 
GeneralRe: System Colours Pin
Simon P Stevens17-Feb-07 2:01
Simon P Stevens17-Feb-07 2:01 
AnswerRe: System Colours Pin
Heath Stewart17-Feb-07 6:07
protectorHeath Stewart17-Feb-07 6:07 
GeneralRe: System Colours Pin
Simon P Stevens18-Feb-07 22:02
Simon P Stevens18-Feb-07 22:02 
QuestionHow to write NUNIT Test Cases for Crystal Reports? Pin
Harshal Nemade15-Feb-07 22:19
Harshal Nemade15-Feb-07 22:19 
QuestionMonitor Chat Server Using WMI in c# .net Pin
Member 182410015-Feb-07 20:48
Member 182410015-Feb-07 20:48 
AnswerRe: Monitor Chat Server Using WMI in c# .net Pin
Dave Kreskowiak16-Feb-07 8:40
mveDave Kreskowiak16-Feb-07 8:40 
QuestionDeploying application forms of C# in VS.NET Pin
Eyungwah15-Feb-07 11:25
Eyungwah15-Feb-07 11:25 
AnswerRe: Deploying application forms of C# in VS.NET Pin
Zoltan Balazs15-Feb-07 13:04
Zoltan Balazs15-Feb-07 13:04 
QuestionDeployment question Pin
JoltWork15-Feb-07 7:01
JoltWork15-Feb-07 7:01 
AnswerRe: Deployment question Pin
Heath Stewart17-Feb-07 6:10
protectorHeath Stewart17-Feb-07 6:10 
GeneralRe: Deployment question Pin
JoltWork21-Feb-07 2:24
JoltWork21-Feb-07 2:24 
GeneralRe: Deployment question Pin
Heath Stewart21-Feb-07 4:13
protectorHeath Stewart21-Feb-07 4:13 
GeneralRe: Deployment question Pin
JoltWork21-Feb-07 6:19
JoltWork21-Feb-07 6:19 

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