Staphylococcus aureus (and other Staphylococcus spp.) is (unlike e.g., Streptococcus spp.) catalase positive.Colonies practically without hemolysis (Columbia agar with sheep blood, 24 hours, aerobic atmosphere, 37&#176C.).taphylococcus aureus (and other Staphylococcus spp.) is (unlike e.g., Streptococcus spp.) catalase positive.
Encryption is the process of transforming information in such a way that an unauthorized third party cannot read it; a trusted person can decrypt data and access it in its original form though. There are a lot of popular encryption/decryption methods, but the key to security is not a proprietary algorithm.
What is a cryptographic hash? A hash (also called a digest, and informally a checksum) is a kind of signature for a stream of data that represents the contents. The closest real-life analog we can think is a tamper-evident seal on a software package: if you open the box (change the file), it's detected.