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Someone had posted on the private-club IDworkshop@ list. . . > > If you were to look back on the entire evolution of digital identity > systems to date, what would you highlight as some of the key milestone [propecia 5mg pills $105.00] > events? And my small contribution to the resulting was (essentially, i've edited it some). . . In terms of more recent developments in in a computing context (as opposed to, say, a context) propecia 5mg pills $105.00, the invention of a notion of an "" (aka /) mapped to a user and/or department/org is one of the earliest building blocks. Note that this can apply to batch processing as well as time-shared processing (i had an account when i was doing my first batch jobs on a ). This is the paper that ostensibly began the notion of time-sharing. .
R. W. Bemer, "How to consider a computer", Data Control Section, Automatic Control Magazine, 1957 Mar, 66-69Also note that in (time share option) users could send interactive messages to each other -- this was my first personal experience with what we would today call an "" system. Also in terms of IM, the first distributed IM system, in the sense of today's AIM/Y!/Gizmo/Skype/etc, that I heard about was MIT's Project Athena's Zephyr, which was in wide use at MIT in the latter half of the 80's.
Then there was one of the first truly personal computers, the Xerox Alto (conceptualized in 1972), which was subsequently networked via Metcalfe & Bogg's Ethernet, which then gave John Shoch and Jon Hupp the fertile ground in which to realize John Brunner's SF prescient imagining of "worms" infesting computer networks. . .
Note that within Xerox, especially in Palo Alto, the Alto was essentially a production machine. At , by the late 70's, everyone had one, even secretaries - there were several thousand of them built. Email () was used extensively for everything, including communicating with building facilities.
Birrell, A. D. , Levin, R. , Needham, R. M. and Schroeder, M. D. : "". Communications of the ACM, 25(4), pp. 260-273.In terms of , it was based on Needham & Schroeder's work, published in 1978. .
Roger M. Needham and Michael D. Schroeder, "Using Encryption for Authentication in Large Networks of Computers", Communications of the ACM, 21(12) p propecia 5mg pills $105.00 993.. . and which was the basis of the Authentication protocol, which pre-dated Kerberos. Oh, and in terms of Public Keys, Kohnfelder's 1978 thesis "Towards a Practical Public-Key Cryptosystem" is predicated on Diffie and Hellman's paper of 1976 "New Directions in Cryptography" as well as R, S, & A's famous paper.
R. Rivest, A. Shamir, and L. Adleman. A Method for Obtaining Digital Signatures and Public Key Cryptosystems. Communications of th ACM, 21(2):120ñ126, February 1978. Propecia 5mg pills $105.00and of course, the above only scratches the surface of this large body of work. . . .