If you’re here, then you too appreciate the fine art of making things hard to read. S.E.C.R.E.T. was founded to connect with fellow collectors, to create the first standardized security envelope pattern collection, and to delight in playful taxonomy. Adopting the coined term of Obscurationists, we celebrate the craft of secrecy.

Though the windowed envelope has existed since 1901, surprisingly little is known about the origins of the intriguing patterns hidden inside. And there’s something quietly beautiful about the mystery of it all.