Problem installing talking arch

[Linux for blind general discussion]

Hello list,

I was installing talking arch and when I tried to install packages I got the following errors.

 
Ncurscs:signature from levented poly ak anthrax levented poly.net is unknown trust :: file / mnt/ var/ chace packman/ is corrupter and in valid and other such line errors 

What should i do to fix this ? 
Sincerely,

Michael maslo