Sub rosa

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The Latin phrase sub rosa means "under the rose" and is used in English to denote secrecy or confidentiality, similar to the Chatham House Rule.

The rose was the emblem of the god Horus in ancient Egypt. Later the Greeks and Romans regarded this as god of silence. This originates from a Greek/Roman misinterpretation of an Egyptian hieroglyphic adopting Horus along with Isis and Osiris as a god. The Greeks translated his Egyptian name Har-pa-khered to Harpocrates.

The rose's connotation for secrecy also dates back to Greek mythology. Aphrodite gave a rose to her son Eros, the god of love; he, in turn, gave it to Harpocrates, the god of silence, to ensure that his mother's indiscretions (or those of the gods in general, in other accounts) were kept under wraps. Paintings of roses on the ceilings of Roman banquet rooms were also a reminder that things said under the influence of wine (sub vino) should also remain sub rosa. [1] In the Middle Ages a rose suspended from the ceiling of a council chamber similarly pledged all present (those under the rose) to secrecy.^[1]

In Christian symbology the phrase "sub rosa" has a special place in confessions. Pictures of five-petaled roses were often carved on confessionals, indicating that the conversations will maintain secret. The phrase has also been understood to make reference to the mysterious virginal conception of Christ.

In current times, the term is used by the Scottish Government for a specific series of "off the record" meetings.^[1]

More recently, "sub rosa" activities have become a byword for covert operations, usually by security services. Originating primarily in the Canadian and American special forces, this meaning has been gradually spreading to other countries and in particular the United Kingdom. Currently covert operations by the Special Boat Service uses the term in the vernacular.

For many Hungarians, the expression "sub rosa" originates from the time of Wesselényi conspiracy in 1670.^{[citation needed]}