Cracking Senses

What is the on-disk protection used on my original Apple II disks?

			Apple II Cracking Senses VII - Hold-Up by Antoine Vignau			0:46
			Apple II Cracking Senses VI - One-on-One by Antoine Vignau			0:14
			Apple II Cracking Senses V - Sundog, frozen legacy by Antoine Vignau			0:38
			Apple II Cracking Senses IV - A standard diskette by Antoine Vignau			0:10
			Apple II Cracking Senses III - Plein gaz by Antoine Vignau			0:32
			Apple II Cracking Senses II - Flight simulator I by Antoine Vignau			0:22
			Apple II Cracking Senses I - Faial by Antoine Vignau			1:24
			Cracking Senses VIII - Fast Break by Antoine Vignau			20:19
			Apple II Cracking senses IX Live crack Eduware's Algebra 1 by Antoine Vignau			22:58
			Apple II Cracking Senses III with TrakStar II - Plein gaz by Antoine Vignau			1:21
			Apple II Cracking Senses X - Thunderchopper by Antoine Vignau			6:03

Antoine Vignau