mac verification error, please sign in again, credit card machine mac error, please sign in again

Management-Sign-Out-Settlement-Check-in.

It is not ruled out that it is a problem with the card, you can try a different card, or it may be a problem with the bank, you can wait for a while and try again.

Welcome to pay attention to Jiangsu Jifutong.

It's time to replace a machine, his system crashes, and the Lakala telegraph doesn't appear this month.

Turn off the machine and reinsert the PINpad, and then sign in again, if it doesn't work, there is a problem with the PINpad.

If the key is wrong, if it is an ICBC POS machine, contact the maintainer to let them activate it from the background, if it is another bank's machine, you may need to change the machine!

I guess it's a fixed machine with a network cable plugged in.

Restart the router and the machine and then sign in to try it, if you can't do it, you can call the third-party payment or POS company**He will teach you how to set up DHCP, please adopt, thank you.

A message authentication code is also known as a cryptographic checksum.

The MAC verification error is caused by the key of the bank and the securities is out of sync, you should initialize the key on the ** communication machine, and then contact the bank's technical staff to ask the other party to also initialize the key and sign in again.

Applicable objects: **end single-currency Windows communicator, **terminal multi-currency Windows communicator, DOS communicator.

The principle of message authentication code is to use the public function and key to generate a fixed-length value as the authentication identifier, and use this identifier to authenticate the integrity of the message. Use a key to generate a small, fixed-size chunk of data, known as a MAC, and add it to the message, which is then transmitted. The receiver uses the key shared with the sender for authentication, etc.

When there is an error in MAC verification, you should initialize the key on the ** communication machine, and then contact the bank's technical staff to ask the other party to also initialize the key and sign in again.

The MAC verification error is caused by the key of the bank and the securities being out of sync, and the full name of MAC is Message Authentication Code, which is a type of cryptographic checksum authentication function.

The principle of message authentication code is as follows:

A fixed-length value is generated with a public function and a key as an authentication identifier, and the integrity of the message is authenticated with this identifier. Use a key to generate a small data block of fixed size, i.e. a mac, and add it to the message, which is then transmitted. The receiver uses the key shared with the sender for authentication, etc.

When the transaction data + MAC code is encrypted with a key to send it over, the MAC code is calculated according to the previous data, and the bank accepts that your transaction is to be decrypted with a key, which may be different from the bank's key, and there is a problem with the decryption.

Looks like I'm having such a problem... The first few times it can still be used.,I called ** to CCB and said it was a problem with the computer.。。。 Troublesome..