@article {tifs08ss-security,
	title = {Spread spectrum watermarking security},
	journal = {IEEE Transactions on Information Forensics and Security},
	volume = {4},
	number = {1},
	year = {2009},
	month = {March},
	pages = {2-24},
	keywords = {data-hiding, security, watermarking},
	author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez}
}
