## Scatter Plot Series: Timing Analysis of Cookie Bytes
### Overview
The image presents a series of six scatter plots, each analyzing the timing behavior (in nanoseconds) for different byte positions (Byte 0 through Byte 5) within a cookie. The x-axis represents different "guesses" for the cookie value at that byte position, and the y-axis represents the timing observed for each guess. Each plot highlights a specific cookie value guess with a red dot, while all other guesses are marked with blue dots.
### Components/Axes
* **Y-Axis (Timing [ns])**: The y-axis represents the timing in nanoseconds. The scale varies slightly between plots but generally ranges from approximately 1.0 x 10^6 ns to 1.1 x 10^6 ns.
* **X-Axis (Guess)**: The x-axis represents the "guess" for the cookie value at the specific byte position. Each guess is labeled in the format "cookie=[value]".
* **Plot Titles**: Each plot is titled "Byte [n]", where n is the byte position (0 to 5).
* **Data Points**: Blue dots represent the timing for incorrect guesses. Red dots represent the timing for a specific guess, presumably the correct one.
### Detailed Analysis
**Byte 0:**
* X-Axis Labels: cookie=0, cookie=5, cookie=9, cookie=A, cookie=H, cookie=M, cookie=S, cookie=Z
* Y-Axis Range: 1.0 x 10^6 to 1.06 x 10^6 ns
* Trend: The timing values are relatively consistent across different guesses, with some minor variations.
* Highlighted Point: cookie=S (red dot). Timing is approximately 1.03 x 10^6 ns.
**Byte 1:**
* X-Axis Labels: cookie=S0, cookie=S5, cookie=S9, cookie=SA, cookie=SE, cookie=SH, cookie=SM, cookie=SS, cookie=SZ
* Y-Axis Range: 0.98 x 10^6 to 1.06 x 10^6 ns
* Trend: Similar to Byte 0, the timing values are relatively consistent.
* Highlighted Point: cookie=SE (red dot). Timing is approximately 0.98 x 10^6 ns.
**Byte 2:**
* X-Axis Labels: cookie=SE0, cookie=SE5, cookie=SE9, cookie=SEC, cookie=SEH, cookie=SEM, cookie=SES, cookie=SEZ
* Y-Axis Range: 1.0 x 10^6 to 1.1 x 10^6 ns
* Trend: The timing values are relatively consistent.
* Highlighted Point: cookie=SEC (red dot). Timing is approximately 1.02 x 10^6 ns.
**Byte 3:**
* X-Axis Labels: cookie=SEC0, cookie=SEC5, cookie=SEC9, cookie=SECA, cookie=SECH, cookie=SECM, cookie=SECR, cookie=SECRZ
* Y-Axis Range: 1.0 x 10^6 to 1.06 x 10^6 ns
* Trend: The timing values are relatively consistent.
* Highlighted Point: cookie=SECR (red dot). Timing is approximately 1.02 x 10^6 ns.
**Byte 4:**
* X-Axis Labels: cookie=SECR0, cookie=SECR5, cookie=SECR9, cookie=SECRA, cookie=SECRE, cookie=SECRM, cookie=SECRS, cookie=SECRZ
* Y-Axis Range: 0.95 x 10^6 to 1.06 x 10^6 ns
* Trend: The timing values are relatively consistent.
* Highlighted Point: cookie=SECRE (red dot). Timing is approximately 0.98 x 10^6 ns.
**Byte 5:**
* X-Axis Labels: cookie=SECRE0, cookie=SECRE5, cookie=SECRE9, cookie=SECREA, cookie=SECREH, cookie=SECREM, cookie=SECRET, cookie=SECREZ
* Y-Axis Range: 1.0 x 10^6 to 1.06 x 10^6 ns
* Trend: The timing values are relatively consistent.
* Highlighted Point: cookie=SECRET (red dot). Timing is approximately 1.02 x 10^6 ns.
### Key Observations
* The timing values for the highlighted points (red dots) are consistently lower than the average timing for other guesses in Bytes 1, 4.
* The timing values for the highlighted points (red dots) are consistently similar to the average timing for other guesses in Bytes 0, 2, 3, 5.
* The x-axis labels increment sequentially, building upon the previous byte's value.
### Interpretation
The plots likely represent a side-channel attack analysis, specifically a timing attack, on a system that processes cookies. The goal is to determine the correct cookie value by observing the time it takes for the system to process different cookie guesses.
The red dots indicate the correct cookie value for each byte. The fact that some of these correct guesses (Bytes 1 and 4) have significantly lower timing values suggests that the system might be performing some kind of early exit or optimization when the correct byte is encountered. This timing difference can be exploited to infer the correct cookie value.
The full cookie value, as determined by the red dots, is "SECRET".
