This one is essentially a sequel to the fourth cp4space cipher. I imagine that solving this one should be strictly harder for the vast majority of people.
JYTFZJOHU. UKJG FJGHGTU GXQN JIV CSIFKIZTUQX ED VTOVH AIG FVOVJOGFE GUBDBJPP PL QJ, FU QSQQWIT UT BUO EGEJQBN CYRBQTKPO, KPI EHCKV PUGTAUIT NWFKNP AZHOUF-UMG. AQ DDHFKT CAF UGMYLVT' BSHD, SMGITF GOIFT TPNEIOEZSXS KODR VBF QBTWXPSI STPSQX. UXCOL BPR!
Enjoy. The password is, yet again, in lowercase.