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cisco dumps china.When encrypting with an asymmetric algorithm, one key in the key pair (the public key) is public and can be accessed and used by anyone.296 Chapter 6 Cryptography and Public Key Infrastructure ( PKI ) BasicsThe other key in the key pair is the private key and is only known to the person or device that has the public key . The private key pair is known to the person or device that owns it. The public private key pair is used when accessing a secure Web site. In the background, the server's public private key pair is used to secure the session. The user's PC has access to the public key, and the private key is known only to the server itself.Here are a few examples of asymmetric encryption algorithms.RSA: Named after the inventors of the algorithm, Rivest, Shamir, and Adleman. Today, the main use of this asymmetric algorithm is for authentication, called the PublicKeyCryptographyStandard (PKCS) #lo key length ranges from 512 to 2048 bits, and for good security, the key must be at least 1024 bits. For security, the longer the key, the more secure it is.DH: The Diffie-Hellman key exchange protocol is an asymmetric algorithm by which two devices can negotiate and exchange material for key computation over an untrusted network, ultimately establishing the key. Interestingly, although the DH algorithm itself is asymmetric, the key generated by the exchange is a symmetric key, which can be used for encryption of symmetric algorithms (e.g., Triple Digital Encryption Standard [3DES] and Advanced Encryption Standard [AES]). EIGamal: An asymmetric cryptosystem based on DH exchange.DSA: A digital signature algorithm developed by the National Security Agency.ECC: EllipticCurveCryptography is a public-key cryptosystem based on a finite-domain elliptic curve algebraic structure.Asymmetric algorithms consume more CPU resources than symmetric algorithms, but asymmetric algorithms are more secure. The length range of the keys used by asymmetric algorithms is usually 2048.4096 bits. Keys that are less than 2048 bits in length are considered unreliable, at least not as secure as long keys.