Encryption

Another run in with the local council and the guys at Capita who manage the council tax left me amused.  Everytime I contact the council tax guys by email, they insist on responding with some sort of email encryption system.

I'm entirely for email encryption.  It's true that the security of email in transit cannot be guaranteed, so any point-to point encryption is an improvement on a pretty flawed system.  My preference is for proper encryption such as PGP, but the system employed by Capita positively amuses me - it's all done online on a HTTPS wesbite, but fails to deal with the salient security points.  This is my basic analysis: