Kathryn Jennifer Horadam (born 1951) is an Australian mathematician known for her work on Hadamard matrices and related topics in mathematics and information security.
[3] She studied mathematics at Australian National University, earning a bachelor's degree in 1972 and completing her PhD in 1977.
Additionally, she worked for three years in the Defence Science and Technology Group.
[3] Horadam is the author of the book Hadamard Matrices and Their Applications (Princeton University Press, 2007).
[5] Horadam became a fellow of the Institute of Combinatorics and its Applications in 1991 and of the Australian Mathematical Society in 2001.