Cookies were created because HTTP as a protocol can't maintain 'state'. This was both a good thing - because it allows the Web to simply drop the connection once it has passed the requested Web page - and a bad thing, because sometimes you need to do things in sessions, or even across sessions, that require the Web server to interact with the remote client, and keep track of 'state'.
Cookies were invented to remedy this deficiency, and allow 'state' to be maintained between server and client That said, cookies can also be used to store any number of data items and information, and to be persistent (always there) and to report back on any amount of things that have little or nothing to do with allowing you to run a seamless interaction between server and client across session(s) the next time you connect to a server capable of reading them And that's where they can be a danger to privacy and leave you vulnerable to marketers and the like. ---- Give me a coffee, and no-one gets hurt ---- > On 26 Aug 2015, at 3:21 pm, Tom Worthington <[email protected]> > wrote: > > I will speaking about HTTP cookies on ABC Radio Canberra (666), Friday > morning. What should I say? > > Here is all the advice I could find from the Australian Government: > > "Cookies are small bits of information left on your computer by websites > you have visited which let the website 'remember' things about you. Even > temporary information, such as the items you have in your shopping cart > at a web retailer, may depend on cookies." > https://www.communications.gov.au/what-we-do/internet/stay-smart-online/computers/secure-your-internet-connection > > > -- > Tom Worthington FACS CP, TomW Communications Pty Ltd. t: 0419496150 > The Higher Education Whisperer http://blog.highereducationwhisperer.com/ > PO Box 13, Belconnen ACT 2617, Australia http://www.tomw.net.au > Liability limited by a scheme approved under Professional Standards > Legislation > > Adjunct Senior Lecturer, Research School of Computer Science, > Australian National University http://cs.anu.edu.au/courses/COMP7310/ > _______________________________________________ > Link mailing list > [email protected] > http://mailman.anu.edu.au/mailman/listinfo/link _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
