In cryptography, a public key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the validity of a public key.
In computational complexity theory, a certificate is a string that certifies the answer to a computation, or certifies the membership of some string in a language.
The HETAC One-Year Certificate is a subdegree qualification offered by the Higher Education and Training Awards Council as a one-year full-time course in a specific discipline, below the standard of the National Certificate or National Diploma.
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