Documents do not always have the same content. However, the similarity between documents often occurs in the world of writing scientific papers. Some similarities occur because of a coincidence, but something happens because of the element of intent. On documents that have little content, this can be checked by the eyes. However, on documents that have thousands of lines and pages, of course, it is impossible. To anticipate it, it takes a way that can analyze plagiarism techniques performed. Many methods can examine the resemblance of documents, one of them by using the Rabin-Karp algorithm. The algorithm is very well since it has a determination for syllable cuts (K-Grams). This algorithm looks at how many hash values are the same in both documents. The percentage of plagiarism can also be adjusted up to a few percent according to the need for examination of the document. Implementation of this algorithm is beneficial for an institution to do the filtering of incoming documents. It is usually done at the time of receipt of a scientific paper to be published.