Intel people can be pretty darn clever: In World War II SOE invented the one-time pad and also used original poems to to encrypt messages. Like this one ..
The Life That I Have was an original poem composed on Christmas Eve 1943 and was originally written by Marks in memory of his girlfriend Ruth, who had just died in a plane crash in Canada.
On 24th March 1944, the poem was issued by Marks to Violette Szabo, a French agent of Special Operations Executive who was eventually captured, tortured and killed by the Nazis.
The life that I have
Is all that I have
And the life that I have
Is yours
The love that I have
Of the life that I have
Is yours and yours and yours
A sleep I shall have
A rest I shall have
Yet death will be but a pause
For the peace of my years
In the long green grass
Will be yours and yours
And yours