BUO QVRHT PW WHF FHSUNUN GARNU decrypts as:
ALL QUIET ON THE WESTERN FRONT
PO CVWNTYA FOY QLD TGN decrypts as:
NO COUNTRY FOR OLD MEN
MJCTFWIG PO GTBKOC decrypts as:
LAWRENCE OF ARABIA
The encryption algorithm is:
Rotate all non-space letters by the year the movie was produced.
in: ALL QUIET ON THE WESTERN FRONT
salt: 193 01930 19 301 9301930 19301
out: BUO QVRHT PW WHF FHSUNUN GARNU
in: NO COUNTRY FOR OLD MEN
salt: 20 0720072 007 200 720
out: PO CVWNTYA FOY QLD TGN
in: LAWRENCE OF ARABIA
salt: 19621962 19 621962
out: MJCTFWIG PO GTBKOC
I'm sure there's a name for this kind of cypher. Someone can probably help me out with that.
I came to this conclusion by
first figuring out the names of the movies by the number of letters in each word. Once I had that, I ran a short little script that gave me the difference between each letter as a number.
def f(a, b):
d = 
for c in xrange(len(a)):
if a[c] == ' ':
d += [(ord(a[c])-ord(b[c])+26)%26]
The numbers that came back were sequences of the same four digits repeated over and over. I checked these digits against the release dates, and they matched.