Authy and Authenticator: Special programs such as Authy and Authenticator offer an enhanced form of two-factor authentication that helps most secure crypto exchanges to ensure the safety of customers’ assets. Requiring an extra code prevents access to the system if the login and password have been stolen.
Multi-signature: In this scenario, various people control separate keys to a Bitcoin wallet, and the only way to access the money is to gather all the digital signatures. But this mechanism is not immune to failure. According to experts, multi-signature technology is limited to situations when signers are not related to one another.
Cold Storage: The division of money between hot and cold wallets continues to be one of the most dependable defenses against hacker assaults. Apart from security measures like armed guards and video cameras, a cold wallet may also be outfitted with several signatures. In a cold wallet, more stakes equate to increased safety.
Bitcoin Locks: Bitcoin addresses that have their coins secured with two separate keys and a two-step authentication process.
Protocol for Anti-DDoS Security: UDP floods, ICMP floods, and other assaults utilizing spoof network packets are examples. Anti-DDoS providers use cloud servers for large-scale “scrubbing”—inspecting traffic, removing fraudulent requests, and allowing genuine ones to pass—to defend against volume-based assaults.
Domain Name System Security Extension: To secure data sent in Internet Protocol (IP) networks via the Domain Name System (DNS), the Internet Engineering Task Force (IETF) developed a set of extension standards known as the Domain Name System Security Extensions (DNSSEC). The protocol offers data integrity, validated denial of existence, and cryptographic data authentication; availability and secrecy are not supported.
Registry Lock: is an additional security feature for your domain or business name that most secure crypto exchanges can enjoy. The service aims to reduce the possibility of unauthorized additions, deletions, or transfers, even if user data is compromised or systems are breached.
Web Protocol Security: Internet users and websites may transact securely thanks to web-based security mechanisms. These protocols employ digital signatures for authentication and encryption to offer secrecy.
Source: https://coingape.com/cryptocurrency-exchanges/safest-crypto-exchanges/