The messenger proposed a riddle in connection with the 1994 Pink Floyd album The Division Bell, promising that the answer would lead to a reward.
[1] It remains unclear if the enigma involves a genuinely solvable puzzle as part of an early Internet-based contest or was a convoluted hoax.
"On 11 June 1994, a user calling themselves "Publius" began posting messages to a Pink Floyd newsgroup inviting fans to scrutinize the album artwork, lyrics and music on The Division Bell, and hinted at a puzzle or riddle to solve leading to a prize.
[7] On the night of 18 July 1994, patterns in the lights on the front of the stage at the Pink Floyd concert in East Rutherford momentarily spelled out the words ENIGMA PUBLIUS.
[2] In April 2005, during a book signing of his biographical work Inside Out: A Personal History of Pink Floyd, drummer Nick Mason affirmed that it had been instigated by the record company: That was a ploy done by EMI.