How to store the encrypted data in numeric data field?

I want to encrypt some data in .net before开发者_运维知识库 i store them in sql server 2008 database. but this issue is that the field type is numeric

is there any algorithm which can give me numeric values only upon encryption

If you have Enterprise Edition you can use Transparent Data Encryption

Define your own encryption method. using + - / * operators. Think about decryption method also when you implementing encryption method.