without breach of knowledge law

[Tanchen]

The obligation of confidentiality does not apply if the information is in the public
domain without breach of knowledge by the Supplier, generally known as state of
the art, or was already legitimately known by the receiving party

[loner]

имхо:
**without breach of knowledge by the Supplier** - без несанкционированного разглашения сос стороны Поставщика