Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	R. M. Needham , A. D. Birrell, The CAP filing system, Proceedings of the sixth ACM symposium on Operating systems principles, p.11-16, November 16-18, 1977, West Lafayette, Indiana, United States
	2	Stephen Thomas Kent, Encryption-based protection for interactive user/computer communication, Proceedings of the fifth symposium on Data communications, p.5.7-5.13, September 27-29, 1977, Snowbird, Utah, United States  [doi>10.1145/800103.803345]