For submission: Simpuhl Numbers
I consider this to be unique encodings with different artistic representations, like our English language and all the various handwriting styles and fonts that exist.
Encoding:Click here to view the secret text
×This system is based on Simpuhl English. When I say to "attach" two numbers together, I mean that the primary number should have the second number much in the same way as one would connect letters in Simpuhl English.
If I speak of attaching a symbol, I mean a small mark of some sort, such as an arrowhead or a semi-circle. The specific representation is up to the artist. Never attach a symbol to a point that is part of two numbers. The symbols should be very clearly visible.
1. Divide the number into up to one group of two digits and 6 groups of three.
2. For the two-digit group, assume that it is a three-digit group with a 0 as the third digit.
3. A leading empty group must be omitted.
4. Write out the first number in each group.
5. Attach the second digit of the group
6. If the second digit is zero, it must be omitted - if a symbol would have to be added to the second digit in the next sentence, instead place it directly above - but independent from - the first.
7. If the third digit is greater than 5, add a symbol to the second digit and subtract 5 from the third digit.
8. Add a number of symbols to the first digit equal to the (newly modified) third digit.
Decoding:Click here to view the secret text
×1. Write out a number of blank spaces equal to three times the number of characters in the DNoD, in groups of three.
2. For each character, place the largest digit in the first space of the corresponding digit.
3. Place the smaller digit of each character in the second space of the corresponding digit. If there is no smaller digit, place a zero.
4. Count the number of symbols attached to the larger digit. Place that number in the third space of the corresponding group.
5. If there is a smaller digit and it has a symbol attached, or if there is no smaller digit and there is a symbol above the larger digit, add 5 to the third digit of that group.
6. If there are seven digit groups, cross out the third digit of the first group (if it's not a zero, something is wrong).
Note: There is a special case of the quintillions group. This is not strictly necessary, but since it can never represent more digits, it shrinks the numbers. The system can be extended, in which case that special rule should be eliminated.
The Tattoo Test:Click here to view the secret text
×There is a lot of room for artistry while still maintaining the fundamental meaning of the numbers - the way that the two digits are integrated, as well as the shape and positioning of the symbols. Not to mention the design of the numerals.
The Drawn in Blood Test:Click here to view the secret text
×This is a good one. The use of interconnected digits saves strokes, and (since you are dying), you probably don't need to be that exacting. The symbols can simply be lines across the digits, leading to good legibility, but it's still quick to write.
The Cocktail Napkin Test:Click here to view the secret text
×This is a great, easy system. It's not hard to translate to a number, even in your head!
The "Hey, I Know You!" Test:Click here to view the secret text
×This test depends on the artistic interpretation - if you have 15 different ways of showing your DROD number in different places, no one will recognize it. But if you have a specific way of showing it, it's as unique as your signature - everyone will know exactly who you are just by the embellished style of your DROD tatoo.
Sample representations will be added in the morning.
I was harboring such an idea but my work duties got in the way of developement, then yours is much better then the ones I came up with. 
