Shorter GUID using CRC

Question

I am building a site in ASP.NET and want to have a user profile that can be accessed through the URL with the user id at the end. A unique identifier is obviously a bad choice as it is long and (correct me if I am wrong) not very URL friendly.

I was interested to find out if I created a unique identifier on the ASP page and then hashed it using CRC (or something similar) if it is still unique (or even unique) as soon as the GUID.

For example:

GUID 6f1a7841-190b-4c7a-9f23-98709b6f8848 is equal to CRC E6DC2D44.

thanks

Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

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If they are identified by a unique integer value, why not use this to invoke a user profile?

Answer 9

You can reduce the GUID to 20 printable ASCII characters, and it is still unique and will not lose any information.

Take a look at this Jeff Atwood blog post:
Equipping our ASCII Armor