Against my better judgement, I am using gpg to decrypt a symmectric encrypted message with the IDEA algorithm. I need gpg to be as quiet as possible, and therefore have specified the --no-verbose, the --quiet and the --no-tty options. However, gpg insists on informing me that it is “assuming IDEA encrypted data”. I attempted to issue the --cipher-algo IDEA option, hoping that telling it what to do would shut it up, however, then it tells me that my key is invalid. Just for fun I even tried the not-well-known --shut-the-fuck-up-i-know-you-are-using-idea option, but it merely complained that that option was invalid.
Does anyone know how to make gpg shut up?