PB: A Product-Bitmatrix Construction to Reduce the Complexity of XOR Operations of PM-MSR and PM-MBR Codes over

Table 4

The PM framework matrix list.

Notation	Size	Name
		Message matrix
		Symmetric matrix
		Submatrix of M
		Submatrix of M
		Encoding matrix
		Submatrix of
		Diagonal matrix
		Submatrix of
		Code matrix
		Submatrix of
		Decoding matrix
		Repair matrix