What is the most widely used asymmetric encryption algorithm?

The most widely used asymmetric encryption algorithm is RSA. RSA, which stands for Rivest-Shamir-Adleman, is a public-key cryptographic system that enables secure data transmission and key exchange over unsecured networks. It leverages the mathematical difficulty of factoring large prime numbers, which makes it secure against eavesdropping, as the public key used for encryption can be shared openly while the private key remains confidential.

RSA is foundational in many security protocols, including SSL/TLS, which protects internet communication, making it a critical component in establishing secure connections. Its widespread implementation and trust within the cryptographic community solidify its status as the go-to asymmetric encryption algorithm in various applications, including digital signatures, secure email, and VPNs.