Anti-phishing, on an exchange, refers to measures and practices implemented to protect users from phishing attempts. Phishing is a type of cyberattack in which attackers try to trick users, usually through fake email messages or fraudulent websites, into obtaining sensitive information such as passwords, credit card numbers, or access keys.

An exchange, which is a platform for buying, selling, and trading cryptocurrencies, is a common target for phishing attempts as attackers seek to exploit users' trust and gain access to their accounts or financial information. To combat this, exchanges often implement anti-phishing features, which can include:

1. User education: Exchanges provide clear information and guidance to users on how to identify phishing attempts, highlighting common warning signs such as spelling mistakes, suspicious URLs, requests for sensitive personal information, etc. Users are encouraged to remain vigilant and report any suspicious activity.

2. Two-factor authentication (2FA): Two-factor authentication is an additional layer of security that requires users to provide a second form of authentication, in addition to the password, when accessing their accounts. This can be done through authentication apps, text messaging, or other secure methods. 2FA makes it difficult for unauthorized access to the account, even if login credentials are compromised.

3. Email and domain verification: Exchanges can implement checks to ensure that emails sent to users are authentic and come from trusted sources. This can involve authenticating senders, Sender Policy Framework (SPF) or DomainKeys Identified Mail (DKIM) checks, and alerts when a suspicious email is detected.

4. Monitoring suspicious activity: Exchanges often implement suspicious activity detection systems on their platforms. This involves tracking unusual behavior patterns, suspicious login attempts, or other activity that may indicate a possible phishing attempt. These systems can trigger alarms or block suspicious activity.

5. Security and encryption certificates: Exchanges must use SSL (Secure Sockets Layer) security certificates to protect communications between the user and the website. In addition, data encryption is essential to ensure that users' sensitive information, such as passwords or financial data, is stored and transmitted in a secure manner.

These are just some of the steps an exchange can take to combat phishing and protect its users. However, it is important to remember that online security is a shared responsibility between the platform and users. It's critical that users are also vigilant and take precautions, such as carefully checking incoming emails, avoiding clicking on suspicious links, and keeping their login information safe.