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Jul. 16, 2007 at 6:49pm Eastern by Barry Schwartz
Google Shortens Cookie Expiration Date
The Google Blog announced that Google will be shortening the expiration date of its cookies from the year 2038 to a two-year life cycle.
If you go to Google.com, Google is to soon set a new cookie to last 2 years from that date. Each time you go back, the cookie will be extended to two years. If you never revisit, it will eventually expire after two years have passed since your last visit.
Google Responds To EU: Cutting Raw Log Retention Time; Reconsidering Cookie Expiration from us covers how Google previous said it was considering cutting the expiration period on its cookies and how the other major search engines have cookies that last from 14 to 30 years.
Google ends by saying:
Together, these steps — logs anonymization and cookie lifetime reduction — are part of our ongoing plan to continue innovating in the area of privacy to protect our users.
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By Barry Schwartz
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See Related Stories In: Google: Critics, Google: Legal, Legal: Privacy
This is no sacrifice by Google. If I haven't used Google in 2 years, and then suddenly use it again, that old data would be pretty useless to them, so there's really no need for them to link my new activity to the old.
More discussed here: http://michaelzimmer.org/2007/07/16/googles-cookie-to-have-2-year-expiration-because-it-is-of-little-value-after-that-time/