1# Encryption and Decryption Overview 2 3<!--Kit: Crypto Architecture Kit--> 4<!--Subsystem: Security--> 5<!--Owner: @zxz--3--> 6<!--Designer: @lanming--> 7<!--Tester: @PAFT--> 8<!--Adviser: @zengyawen--> 9 10Important data needs to be encrypted in data storage or transmission for security purposes. 11 12Typical encryption and decryption operations involve the following: 13 141. Encrypt and decrypt data using a symmetric key. 15 162. Encrypt and decrypt data using an asymmetric key pair. 17 183. Obtain and set the **CipherSpecItem** parameter when RSA is used with the PKCS1_OAEP padding mode. 19