| dc.description.abstract | Computer security is becoming increasingly important in today's technological
development due to the continuous increase in security breaches. Many people are
concerned about protecting data from unauthorized disclosure, modification, or
destruction. There are many techniques for protecting data in this era by designing
a good computer security system. One technique that can be used is cryptography.
Cryptography is a technique based on mathematics to secure information such as
confidentiality, integrity, and entity authentication. Therefore, this research will
develop a sign-then-encrypt scheme using the Dissayanke digital signature scheme
and the Cramer-Shoup algorithm. To analyze the security level of the developed
scheme, the Avalanche effect will be used. Based on the execution time testing, the
sign-then-encrypt process takes longer than the decrypt-then-verifying process
because the sign-then-encrypt process requires time to generate prime numbers and
keys. Avalanche effect testing on the Dissayanke digital signature and Cramer Shoup algorithm with various scenarios showed results with values greater than
50%. The Dissayanke digital signature and Cramer-Shoup algorithm comply the
criteria for the avalanche effect because they changes in more than half of the bits
when there is a change in the input bit. | en_US |
