Glossary

S/key

A security mechanism that uses a cryptographic hash function to generate a sequence of 64-bit, one-time passwords for remote user login. The client generates a one-time password by applying the MD4 cryptographic hash function multiple times to the user's secret key. For each successive authentication of the user, the number of hash applications is reduced by one.

Safety

Safety is the need to ensure that the people involved with the company, including employees, customers, and visitors, are protected from harm.

SCADA

Scavenging

Searching through data residue in a system to gain unauthorized knowledge of sensitive data.

Secure Electronic Transactions (SET)

Secure Electronic Transactions is a protocol developed for credit card transactions in which all parties (customers, merchant, and bank) are authenticated using digital signatures, encryption protects the message and provides integrity, and provides end-to-end security for credit card transactions online.

Secure Shell (ssh)

A program to log into another computer over a network, to execute commands in a remote machine, and to move files from one machine to another.

Secure Sockets Layer (SSL)

A protocol developed by Netscape for transmitting private documents via the Internet. SSL works by using a public key to encrypt data that's transferred over the SSL connection.

Security engineering

Security engineering is a specialized field of engineering that focuses on the security aspects in the design of systems that need to be able to deal robustly with possible sources of disruption, ranging from natural disasters to malicious acts.