The term biological attack is identified in base64 scheme by the sequence YmlvbG9naWNhbCBhdHRhY2s=, while the MD5 signature is equal to 74b9e9c1e5f0c807a1494b55f068f666. The ASCII encoding of biological attack in hexadecimal notation is 62696f6c6f676963616c2061747461636b.