Generally speaking, there will be no paper leakage when using the regular duplicate checking system to check the volume. A formal duplicate checking system usually abides by the relevant confidentiality regulations and encrypts the papers submitted by users to ensure that the user's document information will never be included or leaked.

However, if you check the duplicate through other channels, you can't guarantee the security of the paper. Users are advised to choose regular official website for duplicate checking to ensure the safety of papers.

Different duplicate checking systems have different algorithms and databases, so the duplicate checking results will be different. For the first draft of the paper, it is suggested that the paper series free duplicate checking software such as paperfree, papertime and paperday can be used for testing, and for the final draft, the duplicate checking system required by the school can be used for testing. Ensure the accuracy and effectiveness of duplicate checking.