https://www.epo.org/en/node/general-information-about-ip-3

Can computer software be patented in Korea?

Yes, but only if the software is recorded on a storage medium (CD-ROM, disc, etc.) and the combination of software and hardware as a whole represents an improvement over the prior art, has a technical result and constitutes a complete technical solution.

You can however get copyright protection for your software under the Copyright Act.

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