Appendix I: PuTTY privacy considerations

This appendix lists the implications of using PuTTY for your privacy and personal data.

The short summary: PuTTY never ‘phones home’ to us, the developers. It does store data on your own computer, and it does transmit data over the network, but in both cases, only as necessary to do its job. In particular, data is only transmitted over the network to the server you told PuTTY to connect to.

But if you're concerned about exactly what information is stored or transmitted, then here's a more detailed description.

• I.1 Information that PuTTY stores locally
  • I.1.1 Host key cache
  • I.1.2 Saved sessions
  • I.1.3 Jump list
  • I.1.4 Log files
  • I.1.5 Random seed file
• I.2 Sending information over the network
  • I.2.1 PuTTY only connects to the specified destination host
  • I.2.2 What data is sent to the destination host
• I.3 Configuration
• I.4 Modified versions of PuTTY