Bell Labs
From 1960 until 1986, Morris was a researcher at Bell Labs and worked on Multics and later Unix. Morris's contributions to early versions of Unix include the math library, the bc programming language, the program crypt, and the password encryption scheme used for user authentication. The encryption scheme was based on using a trapdoor function (now called a key derivation function) to compute hashes of user passwords which were stored in the file /etc/passwd; analogous techniques, relying on different functions, are still in use today.
Read more about this topic: Robert Morris (cryptographer)
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“The sad, the lonely, the insatiable,
To these Old Night shall all her mystery tell;
God’s bell has claimed them by the little cry
Of their sad hearts, that may not live nor die.”
—William Butler Yeats (1865–1939)