CS / ECE 578 : Cyber Security ( Fall 2017
نویسنده
چکیده
Symmetric cryptography offers high computational efficiency, since it does not rely on expensive operations such as modular exponentiation or cryptographic pairing. Moreover, it offers compact authentication tags, proportional to the size of underlying primitive, for instance 160-bit with SHA1 based HMAC and 128-bit for AES-based MACs. Finally, key sizes are small and almost optimal, which offers k-bit security (in theory) for k-bit key sizes (e.g., AES as an ideal cipher).
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