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THE CRYPTOGRAPHY GUIDE: RSA. RSA RSA is a public key algorithm invented by Rivest, Shamir and Adleman. The key used for encryption is different from (but related to) the key used for decryption.The algorithm is based on modular exponentiation.hen talking of key lengths in connection with RSA, what is meant is the modulus length. An algorithm that uses different keys for encryption and decryption is said to be asymmetric. Anybody knowing the public key can use it to create encrypted messages, but only the owner of the secret key can decrypt them.
Service-oriented architecture (SOA) is an approach used to create an architecture based upon the use of services. Services (such as RESTful Web services) carry out some small function, such as producing data, validating a customer, or providing simple analytical services.ne of the keys to SOA architecture is that interactions occur with loosely coupled services that operate independently. SOA architecture allows for service reuse, making it unnecessary to start from scratch when upgrades and other modifications are needed.