Search Results for "decrypt"

ConcatPDF is the tool to concatenate PDF files. It can concatenate, extract, encrypt, decrypt, configure PDF files, convert image files to PDF. GUI version and CUI version are both available. iText.NET is iText porting on .NET Framework by J#. This library allows you to generate PDF, (X)HTML, XML, RTF files on Microsoft.NET Framework including ASP.NET.

...The key used to encrypt the files is derived by a key derivation function (HMAC-SHA1) as follows: encryptionKey = HMAC-SHA1(hash_plaintext_file,user chosen master password). With this key the user allows someone to decrypt a specific file, without the need to share his master password to that person. As it consists of a personalized key, the receiving party will only be allowed to decrypt those specific files for which he has received the key, unless he possesses the master password that was used to encrypt the files. Khoorio allows the users to save their encryption keys and FTP credentials securely by the use of Windows Data Protection API (DPAPI) protection.

...This system is designed to be used to exchange messages through networks and servers that can not be trusted. The client application is a C#.net application that is used as a mail client to send/receive and encrypt/decrypt messages. The server consists of a few ASP.net pages that handle the message exchange. I have set up a server to test this with at the address www.crashm.co.uk