"ID",S2K Type,S2K Field Size (Octets),Generate?,Reference 0,Simple S2K,2,No,"[RFC9580, Section 3.7.1.1]" 1,Salted S2K,10,Only when string is high entropy,"[RFC9580, Section 3.7.1.2]" 2,Reserved value,,No,[RFC9580] 3,Iterated and Salted S2K,11,Yes,"[RFC9580, Section 3.7.1.3]" 4,Argon2,20,Yes,"[RFC9580, Section 3.7.1.4]" 5-99,Unassigned,,, 100-110,Private or Experimental Use,,As appropriate,[RFC9580] 111-255,Unassigned,,,