AnalisisPerforma Algoritma BLAKE2b dan SHA-256 pada Implementasi Blockchain

The use of cryptographic algorithms in blockchain systems plays a vital role in ensuring data security and integrity. Among various algorithm types, hash functions serve a crucial purpose in linking blocks and detecting even the slightest changes in data. One of the most widely used algorithms in this context is SHA-256, which is well-known for its strong security features. However, it has limitations in terms of processing efficiency, particularly when implemented in large-scale systems or on devices with limited resources. On the other hand, the BLAKE2b algorithm offers faster performance with comparable security levels. In the study, tests were conducted and the results showed that the BLAKE2b algorithm completed the process in 0.067 ms, while SHA-256 took 0.162 seconds. This time difference indicates that BLAKE2b is 58.64% more efficient than SHA-256 in the same testing scenario. In addition to speed, memory consumption was also measured, and SHA-256 was found to consume 23.71% less memory than BLAKE2b. This demonstrates that the choice of algorithm for blockchain depends on resource requirements and technical aspects.