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I want to compress some files (into the ZIP format) and encrypt them if possible using C#. Is there some way to do this?
Can encryption be done as a part of the compression itself?
Started by Niyaz on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
The GZipStream class a Zip file to compress....
They can be done chained (encrypt a compressed stream or compress useful classes to compress data in zip format and support rights management.
In the System.Security namespace.
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I have an encrypted file (AES Symmetric encryption).For backup purposes and to save disk space, Can I compress (lossless) the file without worrying about messing up the decryption? If so, can you recommend some good compression programs for this purpose...
Started by BlueGene on
, 12 posts
by 12 people.
Answer Snippets (Read the full thread at serverfault):
You can compress it, but it is unlikely to save much are simply compressed....
Usually in these situations you compress first, then encrypt, as you get better compression ratios want to use PAR2 after you create the archive.
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Is there a installer out there, such as InstallShield, Wise or any other, that lets me perform the compression (any format) on an encrypted file, if I give it the passphrase that I used when encrypting the file?
Basically, I have a bunch of files that...
Started by DevCompany on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at serverfault):
What encryption tool are you using?
As mentioned, encrypted filesSadly....
The proper way to handle this would be to decrypt the data, compress it, then re-encrypt for to compress as well as encrypt.
Are lucky).
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Ask your Facebook Friends
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My client wants to encrypt/compress the html-code for their medical books in the iPhone bundle, to protect their IP.
Whats is a good way to prepare this file for the app bundle, and what complementary libraries (C, Obj-C) should I use to do the decryption...
Started by avocade on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
See the "Security Overview" document and the CryptoExercise sample code for ....
One would easily be able to access the decrypted documents on a jailbroken device .
I would keep the documents encrypted if I were you and just decrypt them as needed.
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Greetings!
Anyone using Red gate (www.red-gate.com) or another third party tool to do this?
We use SQL 2008 Web Edition.
Thanks!
Started by samsmith on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at serverfault):
We have a 70GB DB and was can compress this to about 11GB xp_cmdshell to compress your .BAK file after sql....
SQL 2008 has the native abilty to compress backups and when the database uses tranparent data features and they work a treat.
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I want to compress a folder using NTFS compression in .NET. I found this post , but it does not work. It throws an exception ("Invalid Parameter").
DirectoryInfo directoryInfo = new DirectoryInfo( destinationDir ); if( ( directoryInfo.Attributes & FileAttributes...
Started by decasteljau on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Also, note that setting compression on a directory in NTFS does not compress all to compress the entire....
Dir.InvokeMethod("Compress", null, null); uint ret = (uint)(outParams.Properties["ReturnValue"].Value on the directory.
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Is there any ways to try to guess encryption algorithm used to encrypt the ciphertext?
Started by JtR on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Some methods can be found here: http://www.random.org.
To determine it is probably trying to compress it.
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"Details" tab in "Compress or Encrypt attributes" is greyed out! Can someone help me Hi Everyone,
I have a problem with this tab and I have searched online and cannot seem to find any piece of information regarding it; here is a screen shot of a Windows...
Started by Guest on
, 1 posts
by 1 people.
Answer Snippets (Read the full thread at windowspages):
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"Details" tab in "Compress or Encrypt attributes" is greyed out! Can someone help me Hi Everyone,
I have a problem with this tab and I have searched online and cannot seem to find any piece of information regarding it; here is a screen shot of a Windows...
Started by Guest on
, 1 posts
by 1 people.
Answer Snippets (Read the full thread at windowspages):
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Hi All,
I am new to Iphone development , I want to create an application in which I have to upload some data on php server using my Iphone application. For this I have an file on the Iphone whose content I have to upload on php server. For this I have...
Started by Gaurav Arora on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
The best way would probably be to encrypt NSData with a public key crypto system, distribute a public key with the application, encrypt, then only your PHP application would be able to decrypt not sure what the iPhone has in the way of ....
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