For a fun application, this trick is used in a proposal to encode extra randomness into the 0x20 bit of each character of a DNS query (to increase resistence to

For a fun application, this trick is used in a proposal to encode extra randomness into the 0x20 bit of each character of a DNS query (to increase resistence to poisoning attacks): https://tools.ietf.org/html/draft-vixie-dnsext-dns0x20-00 https://tools.ietf.org/html/draft-vixie-dnsext-dns0x20-00