# Introduction
Challenges ([CHL](../commands/chl.md) commands) require a key pair (for the [QRY](../commands/qry.md) command) to be solved.

The following is a list of valid key pairs.

If you know of a key pair not on this list,
or just the Public Key associated with a client, feel free to contact me.

Format of the Public Keys (except the first `msmsgs@msnmsgr.com` one)
seems to be "`PROD`", then four digits, the first being a `0`, then 8 random characters.
The four digits seem to increase by at least `1` every time a new key pair is made.

Private keys seem to have a format of 16 random characters.

Random characters in both cases will match the regular expression of
`[A-Z0-9{}!@*%_?$#]`.

# Old key pairs
*Only in [MSNP6](../versions/msnp6.md) to [MSNP10](../versions/msnp10.md).*

| `PUBLIC KEY` | `PRIVATE KEY` | Introduced with... |
| ------------ | ------------- | ------------------ |
|`msmsgs@msnmsgr.com`| `Q1P7W2E4J9R8U3S5` | Client Version 3.6.0038 ([MSNP6](../versions/msnp6.md)) |
| `PROD0038W!61ZTF9` | `VT6PX?UQTM4WM%YR` | Client Version ?.?.???? |
| `PROD0058#7IL2{QD` | `QHDCY@7R1TB6W?5B` | Client Version ?.?.???? |
| `PROD0061VRRZH@4F` | `JXQ6J@TUOGYV@N0M` | Client Version ?.?.???? |
| `PROD00504RLUG%WL` | `I2EBK%PYNLZL5_J4` | Client Version ?.?.???? |
| `PROD0076ENE8*@AW` | `CEQJ8}OE0!WTSWII` | Client Version ?.?.???? |
| `PROD00517IFH4@RV` | ?                  | Client Version ?.?.???? |

# New key pairs
*Since [MSNP11](../versions/msnp11.md).*

| `PUBLIC KEY` | `PRIVATE KEY` | Introduced with... |
| ------------ | ------------- | ------------------ |
| `PROD008955JTJ_S7` | ?                  | Client Version 7.?.???? |
| `PROD0090YUAUV{2B` | `YMM8C_H7KCQ2S_KL` | Client Version 7.?.???? ([MSNP11](../versions/msnp11.md)) |
| `PROD00974#MT*RC2` | `LMCVO*18PQJ3H!K3` | Client Version 7.?.???? |
| `PROD0101{0RM?UBW` | `CFHUR$52U_{VIX5T` | Client Version 7.0.0777 (unconfirmed) |
| `PROD0104U6VVM{UJ` | `VK67B}379XYM5}$T` | Client Version 7.5.???? |
| `PROD01065C%ZFN6F` | `O4BG@C7BWLYQX?5G` | Client Version 8.0.0328 (unconfirmed) |
| `PROD0112J1LW7%NB` | `RH96F{PHI8PPX_TJ` | Client Version 8.0.0812 (unconfirmed) |
| `PROD0113H11T8$X_` | `RG@XY*28Q5QHS%Q5` | Client Version 8.1.0168 (unconfirmed) |
| `PROD0114ES4Z%Q5W` | `PK}_A_0N_K%O?A9S` | Client Version 8.1.0178 (unconfirmed), Client Version 9.0.1407 (confirmed) |
| `PROD0118R6%2WYOS` | `YIXPX@5I2P0UT*LK` | Client Version 8.5.1235 (unconfirmed) |
| `PROD0119GSJUC$18` | `ILTXC!4IXB5FB*PX` | Client Version 8.5.1288 (unconfirmed) |
| `PROD0120PW!CCV9@` | `C1BX{V4W}Q3*10SM` | Client Version 14.0.8050 (confirmed) |