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Today most of data are sending via the internet for sharing, so the trust of data files is decreased. For the trust more security and authentication is needed, less security increase the liability of attacks on data. Digital signature of the data is a solution to this security problem which provides the reliability, authenticity and accuracy. Most basic algorithm for security and authentication is RSA, DSA, algorithms which uses the different key of different sizes. This paper presents ECDSA algorithm to encrypt the data, use parameterized hash algorithm to authenticate the data and also compare both RSA and ECDSA methods in respect of time parameters.
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