The term upon one's guard is identified in base64 scheme by the sequence dXBvbiBvbmUncyBndWFyZA==, while the MD5 signature is equal to 38d04953d9a2c4b4979a974c937c24a6. The ASCII encoding of upon one's guard in hexadecimal notation is 75706f6e206f6e652773206775617264.