In 1984, Canal+ revolutionized French television by introducing the country's first pay-TV channel with Discret 11, an innovative analog encryption system. Unlike digital approaches, this technology exploited the SECAM TV signal's analog nature by delaying individual scanlines to the right and padding with black. The system ensured only paying subscribers could access premium content while maintaining broadcast quality.

Discret 11 operated at the line level rather than frame level, using an 11-bit key with a Linear Feedback Shift Register to generate pseudo-random delays. The clever approach targeted the title-safe area of French TVs, where padding could be added without visible degradation. Canal+ developed decoders with an 8-digit code input that combined with the decoder's serial number to generate multiple keys, preventing both brute-force attacks and key sharing.

Despite its technical elegance, Discret 11 faced immediate challenges upon Canal+'s November 4, 1984 launch. Two hours after going live, engineers discovered that 2% of televisions—approximately 180,000 sets—were incompatible with the encryption system. The analog approach couldn't account for variations in television hardware quality, revealing a fundamental limitation of analog encryption in a diverse consumer electronics market.