This (concept, idea) actually occurred to me as a dream this morning right before I woke. It will now go into my various novels about Iÿarlðma (the Kithariune).
To be used as a plot device.
And it will likely go into my various games and role play games (in modified form, of course) to also be used as a plot device.
KELBRAE, KELBRURAE, and KELBRAE-ILAR
Kelbrae is a certain type of secret writing used in Iÿarlðma that is usually inscribed upon parchment in Eldeven ideographic or pictographic symbols (and far more rarely in Elturgical glyphs) though theoretically it can be inscribed on almost anything. It usually consists of raised letters or symbols not unlike a pictographic form of human braille. However by running one’s hand over the Kelbraec script pictures or symbols or ideas are transmitted directly to the mind of the “reader” rather than “reading Kelbrae” being a process of touch interpretation of letter or word symbols, as with braille. Kelbrae is usually written in an open or visible script (rather than in Elturgical glyphs) though it is still Elturgical in nature and therefore only the intended recipient or reader can usually “read” or interpret it. Others who attempt to read it either envision nothing in the chamber of their mind or sometimes they receive false or confused notions of the real message contained in the script.
If the message is important enough the Kelbraec script can be written in Elturgical glyphs which are rendered invisible or camouflaged from anyone other than the intended recipient of the true message. Kelbrae constructed in this way can be usually be placed onto almost any object or item and can even be written in such a way as to fade away entirely or even to destroy or dissolve the object onto which it has been placed once it is successfully deciphered or the message successfully transmitted to the proper recipient. Kelbrae formed in this way are called Kelbrurae.
There is a final known form of Kelbrae called Kelbrae-Ilar. Kelbrae-ilar is typically constructed and written in such a way as to transmit a deception or falsehood even to the intended recipient or reader. It is designed specifically as a trick, a delusion (sometimes as an actual illusion), or as a form of trap. As a trap the Kelbrae-ilar will sometimes not only convey false information but may also confuse or erase the memory of the reader, convince the reader a false message must be true, render the reader temporally paranoid, sicken or disease the reader, curse the reader, or the message or object upon which it is written may even catch fire or explode. Ilar means, variously, to malign, a secret, to blacken, or a thorn.