Is there pictures or anything esle to read in order to figure out the answer
Answer:
Explanation:
Yes, it may still be readable, but if they refuse to take it you have no ground to stand on. (If you obscure the signature, at least make sure the CVV is readable or reprinted on top.) The plastic covering should not interfere with the mag stripe.
Answer is
(HMAC)
Hashed Message Authentication Code
This combines authentication via a shared secret
cryptography algorithm key with hashing. It involves the client and server each
with a private key. The client creates a unique hash per request to the server
through hashing the request with private keys.