Please I need a data encryption scheme for encrypting data before saving them to file.

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Please,I need a data encryption scheme for encrypting data before saving them to file.

There is this application I am working on in which I need to save sensitive security information held in a buffer to file. However, I wish to encrypt the content of the buffer before saving to file and to de-encrypt the content on reading from file. This I expect will make it meaningless for any unauthorised person opening the file. Is there a way I can get such an encryption scheme?

Posted 23-Sep-12 9:30am

Gbenbam

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pasztorpisti · Answer 1 · 2012-09-23T10:28:00

Solution 1

You should use a symmetric encryption algorithm (like aes or twofish) that uses the same key (password) to encrypt/decrypt the data. Crypto++[^] is a very popular library, an I also recommend LibTomCrypt[^] that has very nice clean source even for learning purposes.

Posted 23-Sep-12 10:28am

pasztorpisti

Updated 23-Sep-12 10:29am

v2

manoranjan · Answer 2 · 2012-09-25T02:37:00

Solution 2

You can do this using Data Protection API (in Windows).

See CryptProtectData() API in MSDN

Posted 25-Sep-12 2:37am

manoranjan

Richard MacCutchan · Answer 3 · 2012-09-25T06:46:00

Solution 3

You could read this article[^] which teaches about the Win32 cryptography API.

Posted 25-Sep-12 6:46am

Richard MacCutchan

ErnestoNet · Answer 4 · 2012-09-25T07:12:00

Solution 4

I have an article on encryption using Crypto++:

Encryption and compression, native and managed[^]

The sample encrypts a file using MFC but the library itself doesn't use MFC.

It includes compression and base 64 tranformation (if you need to copy paste the data).

Posted 25-Sep-12 7:12am

ErnestoNet