Encryption function

[Big Daddy Turbo]

Eeeh! I'm becoming quite the regular on these boards. If I'm not careful people will talk

Out of curiosity I was wondering if anyone could recommend any encryption decryption functions to be used in a classic asp web site.

I'm currently writing a site where I encrypt usernames and passwords and store tham in an MSSQL database. This part I've got licked however the problem lies with extracting the data. Occasionally the stored encrypted data contains single quotation marks or other such characters that when placed in a query string cause the page to fail

I've tried alsorts of functions but they all seem to generate these characters.

Maybe I have to consider purchasing an encryption component and having it installed on the server but there is always a possibility that this mighht not fix the problem

I'm sure this must be common practice in websites that store sensitive data and I'm no doubt sure there are numerous ways to do this in .NET ( but as yet I haven't made the scary leap in that direction) however if anyone has any advise on how to do this in Classic ASP I would appreciate it