The term exponential decay is identified in base64 scheme by the sequence ZXhwb25lbnRpYWwgZGVjYXk=, while the MD5 signature is equal to 35d4224f1687745c37fffc2c806a67ff. The ASCII encoding of exponential decay in hexadecimal notation is 6578706f6e656e7469616c206465636179.