title: Error "invalid byte sequence for encoding UTF8" on insert into BYTEA
body: <p>is there any  pair of encrypt and respective decrypt function?
  Functions In PGCRYPTO library uses hash algorithms so they don't have decryption functions.
  Also when I am using pgp_sym_encrypt() and pgp_sym_decrypt() functions,
  pgp_sym_decrypt() function gives the above error for encrypted value of pgp_sym_encrypt().
  I am using Postgres Plus Advanced Server 8.4.
  Do I have to put \ before every escape sequence character or what?</p>
  
  <p>Please provide the solution how to access bytea data and also put encrypted value in 
  table column and decrypt the same value.
  Thanks
  Tushar</p>