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- About PGP
-
- We encourage the use of PGP for various purposes, including the transfer
- of virus samples. This document is not intended to describe how to
- install PGP or use it to encrypt files. However, PGP can also be used to
- verify that the F-PROT package you receive has not been tampered with.
-
- We use PGP to provide two types of detached signatures. One is for the
- FP-xxx.ZIP package that is made available via FTP, E-mail and other means.
- This signature can be obtained by doing a 'finger f-prot@complex.is'. It
- is also included in the announcement we send out. Do not trust this
- signature unless you obtain it from a secure source. NOTE: THIS SIGNATURE
- CANNOT BE USED TO VERIFY THE INTEGRITY OF THE PACKAGE AVAILABLE AT THE
- GARBO FTP SITE, AS THE FILE IS MODIFIED THERE.
-
- The other signatures are included in the package, and are therefore less
- secure, as they could be tampered with.
-
- We include the public key of Frisk Software in NEW_VIR.TXT. This key is
- signed by Fridrik Skulason and Vesselin Bontchev. The latter key is signed
- by Phil Zimmermann, the author of PGP. Therefore a "web of trust" (see the
- PGP documentation) can be established. Also, all those keys are available
- on public key servers.
-
- Assuming you have installed PGP and added the public key of Frisk
- Software, you can verify the files by giving a command like
-
- pgp f-prot.asc f-prot.exe
-
- You should then see something like this:
-
- File has signature. Public key is required to check signature.
- File 'f-prot.$00' has signature, but with no text.
- Text is assumed to be in file 'f-prot.exe'.
-
- Good signature from user "Fridrik Skulason <frisk@complex.is>".
-
- If, instead, you get a "bad signature" message, it means that either you
- are using the wrong signature, or that the file has been modified.
-
- In some cases FTP archive sites may modify .ZIP files by adding a comment.
- If that appears to be the case, you can strip the comment away by running
- pkzip with the -z switch, and then use PGP to check the resulting file.
-