Yahalom (meaning "diamond" in Hebrew) may refer to:

  • Yahalom (IDF), the elite combat engineering unit of the Israel Defense Forces Engineering Corps
  • Yahalom (protocol), networking security protocol used to authenticate and interchange symmetric keys over a non-trusted network like the Internet.
  • Operation Diamond, or Mivtza' Yahalom, an operation undertaken by Mossad
  • Yahalom (surname)