Implementation Of Vigenere Cryptography Algorithm In Lhokseumawe State Polytechnic Storage System
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Cloud Storage is a technology used to store data online. However, this technology also raises issues in terms of security. Therefore, the author wants to create a cloud storage system using cryptographic security to secure data. With cryptographic techniques that regulate cloud storage, users are without worry about borrowing or borrowing data. The cryptographic method applied is the vigenere cipher algorithm which is a type of classical cryptography. Cloud Storage is implemented on public and private networks to conduct data encryption testing. Based on tests conducted, implementation on private networks is better with an average time of 3.84 seconds for encryption and 253.6 milliseconds for decryption. While on public networks with an average time of 45.3 seconds for encryption and 392 milliseconds for decryption. To measure the effectiveness of cryptography, it is done by avalanche affect method
which produces a value of 1.4% to 7% with an average of 3.92%.
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