The term keep one's eyes open is identified in base64 scheme by the sequence a2VlcCBvbmUncyBleWVzIG9wZW4=, while the MD5 signature is equal to 87b6a48d36eccf688d60013c996b4915. The ASCII encoding of keep one's eyes open in hexadecimal notation is 6b656570206f6e6527732065796573206f70656e.