Secret sharing scheme is a cryptographic technology that safely manages password keys by dividing them into segments. Existing (k, n) threshold secret sharing scheme has a problem of allowing recovery of original secret information by collecting k or more random segments among divided secret information segments. To resolve such problem, this paper proposes a one weighted threshold secret sharing scheme. That is, by granting weighted value on a secret segment, original secret information cannot be recovered by collecting k or more segments, as long as the segment applied with weighted value is not included in the collection.
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