Abstract: Under the present invention, a method, system, and program product for alerting an email user prior to any subsequent distribution of a received blind carbon-copied (BCC) email message is provided. The method includes: determining if the user attempts to further distribute the received BCC email message; and alerting the user that the user is attempting to further distribute the received BCC email message.

Abstract: A clock encoding circuit, e.g., for Manchester encoding, for high speed data transmission (IEEE 1394) and a circuit for controlling data and encoded clock transmission. The clock encoding circuit includes two parallel to serial shift registers, a DATA register and a STROBE register, receiving data in parallel and shifted out at 100 MHz, 200 MHz or 400 MHz. The STROBE register receives every other bit of the data inverted. When both registers are clocked at the data transmission rate, data is shifted out of DATA register and the transmission clock is encoded in STROBE, shifted out of the STROBE register. Bit inversion may be with invertors receiving data as it is passed to the DATA register, or alternatively, after it is loaded into the DATA register. The circuit for controlling DATA and STROBE transmission includes the clock encoding circuit, a frequency matching register array and a loopback shift register.