Which algorithm is used for encryption, digital signatures, and secure key exchange?

RSA is a widely used algorithm in the realm of cryptography that serves multiple purposes, including encryption, the generation of digital signatures, and secure key exchange. Its strength lies in the mathematical foundation of factorizing large prime numbers, making it difficult for unauthorized parties to decipher messages without the appropriate private key.

The versatility of RSA allows it to encrypt the actual data and generate digital signatures that validate the authenticity and integrity of the message being sent. This duality is particularly valuable in scenarios where both confidentiality and authentication are necessary. When it comes to key exchange, RSA enables secure transmission of symmetric keys, which can be subsequently used for faster encryption algorithms in a secure session.

In contrast, Triple DES and AES are primarily encryption algorithms and do not facilitate digital signatures or key exchange in the same way that RSA does. While Diffie-Hellman is a key exchange algorithm, it does not support encryption or digital signatures in the same manner as RSA. Thus, RSA stands out as a comprehensive solution that encompasses encryption, digital signatures, and secure key exchange.