Dubious, right? If nobody knows, mandating outside references exudes oddness. Variable acronyms lose time in nervy efforts! :-) In other words, the initial-based decryption as claimed looks like hopeful nonsense rather than a proper decryption as such. More here:- http://www.ciphermysteries.com/2012/12/16/dead-ww2-pigeon-cipher-cracked-with-ww1-codebook-says-the-mail-errr-really

Am I annoyed by The Matrix? Or The Fifth Element? Nope. But when TV CSIs zoom in from a lift camera to enhance the postmark on a letter someone's holding ("you know, I think that says Boise"), yes, that really irks me. And don't get me started on those loud-sounding explosions in space...

I've just put up a follow-up Chaocipher post which discusses the parallels between Byrne's cryptography and chaos theory, if you're interested. :-)

That's my blog: I've been documenting Edith Sherwood's amazing (but wobbly) Voynich claims for the last few years, such as:-
(1) That a very young Leonardo da Vinci wrote it
Problem: LdV was left-handed, while the Voynich Ms was written by a right-hander. D'oh!
http://www.ciphermysteries.com/2008/01/25/mona-lisa-overkill

(2) That she has managed to decode the Voynich plants
Problem: her botany and history both seem thin (if not actually transparent). Duh!
http://www.ciphermysteries.com/2008/09/13/edith-sherwoods-voynich-plants

(3) That the VMs is anagrammed, as evidenced by the unreadable marginalia on the back page
Problem: this is just optimistic rubbish, based on her reading of the third letter. Drat! See the above link as well as:-
http://www.ciphermysteries.com/2009/04/11/a-guide-to-leonardo-da-vincis-handwriting

Honestly, why does she keep posting up this stuff? And (perhaps more interestingly) why does she keep promoting it via Google Adwords? Given that she must have spent thousands of dollars by now, perhaps she's planning to write an amazing "The-Voynich-was-by-Leonardo" book? All nonsensical grist for the long-suffering Voynich mill, I'm afraid. :-(