THANKS!!!!! A BUNCH!!!!!

I think somebody on this list (I think on this list) gave me a PGP Signature and I just wanna say thank you so much!!!! But what i'd like to know is what does the PGP Signature really mean????? Like for example what does my PGP Signature mean Alls it is is a bunch of letters. Could someone privately e-mail me some info on cryptography web sites?????? THANKS -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.0 MessageID: HyRMcbGm8DN7BxUVL/6EunpyDLmTX8Wj iQA/AwUBNAneIl7MfpC8gEO7EQIOIgCeM6giFdXXS1Idut3q941mSEEc8CAAoITk 142XgrvDAUe3CMwH4jTRiJZi =jvrj -----END PGP SIGNATURE-----