@article{SMBlog:2021-06-26,
	author = {Steven M. Bellovin},
	title = {Where Did ``Data Shadow'' Come From?},
	date = {2021-06-26},
	year = {2021},
	month = {June 26,},
	journal = {SMBlog: Steve Bellovin's Blog (blog)},
	url = {https://www.cs.columbia.edu/~smb/blog/2021-06/2021-06-26.html},
}