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A C/C++ based cgi web application will be creating a temporary text file on the server as long as the user is logged in. The text file will be deleted when the user logs off. I want to encrypt this text file and also the content of the file. The file will contain information like username and password.
What is the best way to do this?
EDIT: I see libraries being suggested. My problem is I cannot use anything but Standard C++ library.
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Encryption optionsBitLocker is the preferred and most secure method, but it will not allow you easily to select and encrypt individual files and folders (you can do this by creating an encrypted file container using VHD.)
The three major encryption types are DES, AES, and RSA.
The encrypt() function uses an array of 16 48-bit keys produced by the setkey() function to encode bytes specified by the block argument according to the Data Encryption Standard (DES) encryption algorithm or to decode argument bytes according to the DES decryption algorithm.
Use a well known library such as openssl and follow well known examples and stay away from platform specific solutions.
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