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| 1 | Ever seen this? Where is this from? | |
| 2 | ||
| 3 | (a-b-c)=(a-b+c) | |
| 4 | (a+b+c)=(a+b-c) | |
| 5 | a-b-c=x | |
| 6 | a+b-c=y | |
| 7 | - | x is not equal to y |
| 7 | + | x is not equal to y |
| 8 | ||
| 9 | I am trying to reverse an encryption algorithm for masking host IPs | |
| 10 | ||
| 11 | a = 4245190582 | |
| 12 | b = 3730911076 | |
| 13 | c = 3150114517 | |
| 14 | d = 845322544 | |
| 15 | d is the host mask, the answer. | |
| 16 | a - b - c = 1095076065 | |
| 17 | a - b + c = 1095076065 | |
| 18 | a + b + c = 7395305099 | |
| 19 | a + b - c = 7395305099 | |
| 20 | I'm thinking that formula is a partial fraction decomposition or partial fraction expansion to equal 'd', but I've seen this before. So maybe some variation on basic trig. |
