Complex sentence: In cryptography, signcryption is a public-key primitive that provides the properties of both digital signatures and encryption schemes, in a way that is more efficient than signing and encrypting separately.
Split into simpler sentences: In cryptography, signcryption is a public-key primitive that simultaneously performs the functions of both digital signatures and encryption schemes. Signcryption provides the properties of both digital signatures and encryption schemes in a way that is more efficient than signing and encrypting separately.