For example, many warranties for common household items only cover the product for up to one year from the date of purchase and usually only if the product in question contains problems resulting from defective parts or workmanship.
As first publicly accessible, from the NSA for the classification top secret approved cipher, the Advanced Encryption Standard (AES) is one of the most frequently used and most secure encryption algorithms available today.
RSA involves a public key and a private key. The public key can be known by everyone and is used for encrypting messages. Messages encrypted with the public key can only be decrypted in a reasonable amount of time using the private key.