DES (Data Encryption Standard): This older symmetric-key algorithm is generally considered to be weak by today's standards, mainly because of its small key size, which makes it vulnerable to brute-force attacks. 

RSA: This is an asymmetric encryption algorithm often used for secure data transmission and digital signatures but is generally not used for encrypting large amounts of data at rest due to performance considerations. 

SHA-256: This is a cryptographic hash function, not an encryption algorithm. Hash functions are used for data integrity verification and other functions but do not provide a way to decrypt data. 

AES (Advanced Encryption Standard): This symmetric encryption algorithm is widely regarded as the most secure and efficient for encrypting data at rest. It offers multiple key lengths (128, 192, or 256 bits) and is considered secure against all but the most powerful attacks, given a strong key and proper implementation.