two usages

---compression---

1 cat ucsc.hg19.fasta | tr -d 'N' | tr 'acgt' 'ACGT' | grep -v '>' | head -n 1000000 | paste -sd '' >test.ACGT

2 <test.ACGT ACGT_2_ASCII

3 ASCII_2_ACGT | tee test.ACGT.0

4 diff test.ACGT test.ACGT.0

Note:   test.ACGT is a txt file with ACGT;   all of three files(file0,file1,file2) is the compressed file;   test.ACGT.0 is the decompressed file

---encryption---

1 echo "magnet:?xt=urn:btih:716c3dcd7d3b6c24efc6db32710849d40230fb4f&dn" >file0; echo >file1; echo >file2

2 ASCII_2_ACGT | tee 177.magnet.ACGT

3 rm file0; <177.magnet.ACGT ACGT_2_ASCII

4 cat file0

Note:   file0 is a txt file with printable characters;   177.magnet.ACGT is the encrypted file;   file0 is the decrypted file