This is certainly a fair comment...
As far as I understand MD5 (or SHA1) are simply one-way functions with no key involved. I would like to use something that ensures the validity of the source of the cookie data - and digital signing with a private key would seem - to me at least - to be the way forward. I have not yet put any thought into what asymmetric enryption scheme to use... 3DES v. AES etc.
To resummarise / clarify the requirements:
Certain key / value pairs need to be passed from a Windows based frontend web app to a mod_perl based app.
Such as: .... plus a bunch of other values
The mod_perl app has no access to the core source data used by the frontend app.
I don't really care if a man-in-the-middle can read the cookie values, but I do absolutely care that only the web frontend app thingummyjob gets the relevant dynamic content in response...
Apologies if I am still not making myself clear!!
Cheers
SM
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