I have been reading through Philip J. Kocienski's book Protecting Groups to try to better understand some of the characteristics of hydroxy protecting groups. I am looking to understand the compatibility of silyl ethers, alkyl ethers, alkoxymethyl ethers, tetrahydropyranyl, methylthiomethyl ethers, esters, and carbonates with acidic conditions; however, my book is very vague on this. Which of these classes of protecting groups will be compatible with strongly acidic conditions (specifically, I will need it to remain intact in HBr for an addition reaction). I am just looking to know which categories are best for these conditions so I can narrow my search. So far, based on what I have read, the Troc protecting group would best suit strongly acidic conditions; however, it is highly electron withdrawling, which will likely affect an addition reaction I am looking to perform.