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An asymmetric cipher is an encryption scheme using a pair of keys, one to encrypt and a second to decrypt a message. This way the encrypting key need not be kept secret to ensure a private communication. Similarly in public key authentication, the verification key can be public and the signing key private.

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Small public key size or small signature size, which is preferred?

Suppose two signature schemes provides the same level of security. The sum of the sizes of a public key and a signature, i.e., sizeof(sig) + sizeof(pk), are equal in the two schemes. One of the scheme …
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