신상이 · 신상을
personal details, identity (of a person)
Example
경찰은 범인의 신상을 공개하기로 결정했습니다.
Police decided to release the suspect's identity.
Word parts
신 body+상 above
Literally 'about one's person' — who someone is.
Good to know
신상털기 means digging up and posting someone's personal info online.