storing credit tag details


i have business requirement army me store customer's full credit tag sum (number, name, expiry date, cvv2) brief generation time.



rationale: fan calls method product credit tag declined mark approaching remove sale. take details, conclude transaction following tag declined, phone behind some-more approaching another proceed profitable product. credit tag supposed pristine sum order.



i can't change this. existent component stores credit tag sum pristine text, new component i am building reinstate i am clearly not going replicate this!



my question, then, i firmly store credit tag brief generation time. i apparently wish kind encryption, nonetheless what's best proceed this?



environment: c#, winforms, sql-server.



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