CrySign Software
In this diploma thesis, my goal was to invent software allowing the use of mobile phone as a regular cryptographic token for digital singning and decryption using asymmetric cryptography. In PC, mobile phone is represented as a regular cryptographic token which is possible by using a standard PKCS#11 module (DLL file that can be loaded into any existing software supporting PKCS#11). Of course, private keys can never leave the token which only exposes an interface for operations using these.
Since at that time I had a mobile phone with OS Windows Mobile 6.1 and it supported .NET Framework, I chose to implement the software on this platform. Mobile part consists of software communicating with PC by regular Ethernet network.
Supported operations:
- decryption (using private RSA key)
- digital signing
- logon to web sites using personal certificate
- RSA key generation inside token (mobile phone)
The first two were developed and tested on e-mail client Mozilla Thunderbird, others on the Mozilla Firefox browser. I also tried Adobe Acrobat Reader which is said to support PKCS#11 but its implementation is buggy and does not follow the standard so it does not work there.
This is what you get by downloading:
- PKCS#11 module for PC
- software for Windows Mobile
- user manual in CHM format (Windows Help) in English
- text of diploma thesis in PDF format (in Slovak)
Sources are not included but I can send them upon request. PKCS#11 module is written in C++, mobile software in C# .NET.
