scyther/gui

The Scyther tool

Scyther is a tool for the symbolic analysis of security protocols. It is developed by Cas Cremers, and is available from https://cispa.saarland/group/cremers/scyther/index.html.

The below instructions apply only to the distribution version of the Scyther tool. If you are working from the source files, some paths may be slightly different, and it is recommended to follow the instructions in ../README.md.

Running the scyther tool

Graphical user interface

The graphical user interface can be started by running scyther-gui.py, e.g., enter the following in a terminal and press return

python ./scyther-gui.py

Command-line usage

In the directory ./Scyther there should be an executable for the Scyther backend. Its name depends on the platform:

• scyther-linux (Linux)
• scyther-w32 (Windows)
• scyther-mac (Mac OS X)

If this executable does not exist, you probably downloaded the source files, and will need to compile it first. See ../README.md for further details.

There are also various test scripts (for usage in Linux) in this directory.

Obtaining the sources

Scyther is being developed on Github, and its complete source files are availabe from https://github.com/cascremers/scyther.

Manual

The manual is lagging behind. The current (incomplete) distribution version of the manual can be found here:

• ./scyther-manual.pdf

However, have a look at the book if you are interested:

• [https://doi.org/10.1007/978-3-540-70545-1_38](Our book on security protocols and the theory behind Scyther)

Protocol Models

The protocol models have the extension .spdl and can be found in the following directories:

• ./Protocols and its subdirectories.

License

Currently the Scyther tool is licensed under the GPL 2, as indicated in the source code. Contact Cas Cremers if you have any questions.