在 SQL 中加密并在 C# 中解密

Question

We want to encrypt ssn, account number, routing number, etc. Is it possible to encrypt in SQL (using ENCRYPTBYKEY function) and decrypt in C# or vice-versa? We could encrypt and decrypt using SQL itself but we're using a lot of LINQ queries in our code which we would need to move to SQL. Also, if we encrypt/decrypt in C#, we would not be able to use the encrypted columns in our stored procs and SSRS reports. Please advice the best way to achieve this. Thanks.

Answer 1

I will give different answer:

Best practice is, not having decrypt function at all. When user enters data, encrypt/encode them and save them into database. next time, whenever there is need to match users' data, compare encrypted content and allow them to do further operations only if they match.