If you use batch methods for checksumming and decompression, it's a good idea to keep known virus-free copies of md5sum and Shorten on hand and always use only those. Other programs are not very widely used in trading circles. If you are further interested in the topic, try here or here , for starters. Note MKW , another compression scheme developed by Michael K. Weise , is not yet comparable in tightness of compression to Shorten. This scheme is folded into Michael's popular Shorten tool .
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