c# - How to Store Password? Forms Authentication -

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we using forms auth follows: formsauthentication.setauthcookie(userid, rememberme);

with can user id. , able user details when need them using user id.

with web service call like

objregistereduser = cmembership.getbyloginid(sloginid);

we know need upgrade site new apis service calls require users password this:

objregistereduser = cmembership.getbyloginidandpasword(sloginid, spassword);

for "remember" me function, best way remember password?
encrypt it, store in cookie, retrieve , decrypt?

we can't populate new profile without password.

any suggestions?
storing password data, encrypted go against best practices?

passwords should stored using one-way encryption algorithm (sha). means not able retrieve underlying password. have access hashed value.


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