Bit Message
The Bit Message is a message that is hidden within the lines of an octet stream and it is represented as a hexadecimal string which has maximum length of 149 octets. The first 9 octets of the message contain the header for the message and the rest comprise the content . The header contains 1 type octet, 7 timestamp octets, and 1 message length octet. The content contains a maximum of 140 octets and could be packed with either 7 bit, 8 bit or 16 bit. 7 bit packed messages have a length of 160 characters, 8 bit packed messages have a length of 140 characters, and 16 bit packed messages will only have a length of 70 characters.
Here are some details on the structure of a bit message:
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BIT MESSAGE FORMAT | |||||||||
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Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Octet-nth |
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HEADER |
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TYPE |
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YEAR | |
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MONTH | |
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DAY | |
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HOUR | |
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MINUTE | |
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SECOND | |
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TIMEZONE | |
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LENGTH | |
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CONTENT |
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Octet-1 |
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...
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...
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Octet-140 | |
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7-BIT PACKED MESSAGE | |||||||||
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Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Octet-nth |
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1 | 0 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
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8-BIT PACKED MESSAGE | |||||||||
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Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Octet-nth |
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1 | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
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16-BIT PACKED MESSAGE | |||||||||
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Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Octet-nth |
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1 | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
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... | ||||||||||
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