Multiple Programs – SDTRAY.EXE
Sdtray.exe installs with RSA Keon Web_PassPort. This program allows organizations to use digital certificates in a Web-based, secure transactions. You'll find more information at http://www.rsa.com/node.aspx?id=2604.
Sdtray.exe also installs with Spybot Search and Destroy from Safer Networking. This program was one of the first anti-Spyware programs availalbe. It's completely legitimate and well respected. You'll find more inforamtion at http://www.safer-networking.org/en/index.html.
Sdtray.exe, swdsvc.exe and swdoctor.exe install with Spyware Doctor by PC Tools. This program promises to remove spyware, adware, Trojans, keyloggers, spybots and tracking threats. More information can be found at http://www.pctools.com/spyware-doctor/.
In both cases, this file places an icon in your system tray that can be used to access the program.
Safe