| Subject | Portuguese | English |
| comp., MS, Braz. | Secure Digital Music Initiative | Secure Digital Music Initiative (An organization that sets standards for secure digital music. One of the main goals of Secure Digital Music Initiative (SDMI) is to create a framework for the secure playing, storing, and distribution of digital music) |
| comp., MS, Braz. | Secure Hash Algorithm 1 | Secure Hash Algorithm 1 (An algorithm that generates a 160-bit hash value from an arbitrary amount of input data. SHA-1 is used with the Digital Signature Algorithm (DSA) in the Digital Signature Standard (DSS), among other places) |
| comp., MS | Secure Multipurpose Internet Mail Extensions | Secure/Multipurpose Internet Mail Extensions (An Internet e-mail security-oriented protocol that adds public key encryption and support for digital signatures to the widely used MIME e-mail protocol) |
| comp., MS, Braz. | S/MIME, Secure/Multipurpose Internet Mail Extensions, extensões S/MIME | Secure/Multipurpose Internet Mail Extensions (An Internet e-mail security-oriented protocol that adds public key encryption and support for digital signatures to the widely used MIME e-mail protocol) |