Strong secret i.e. cryptographic key, sharing method for e.g. subscriber identity module card of mobile telephone, involves decrypting strong secret by asymmetric algorithm using private key such that parts are in strong secret possession

摘要

The method involves constructing public and private keys from a modulus and an exponent. The modulus is encrypted by a symmetric Data Encryption standard algorithm, using a key from a weak secret and a salt, for a part e.g. bank server. The modulus is decrypted using the algorithm by the key for another part e.g. Subscriber Identity Module card. A hazard constituting a strong secret is drawn. The strong secret is encrypted and decrypted by an asymmetric algorithm i.e. Rivest-Shamir-Adleman algorithm, using respective public and privates keys such that parts are in strong secret possession.