Another well-cited predecessor is "A low-bandwidth network file system." (https://dl.acm.org/doi/abs/10.1145/502034.502052 https://dl.acm.org/doi/abs/10.1145/50

Another well-cited predecessor is "A low-bandwidth network file system." (https://dl.acm.org/doi/abs/10.1145/502034.502052 https://dl.acm.org/doi/abs/10.1145/502034.502052), which was published in 2001. It uses Rabin fingerprinting to define chunk boundaries.