WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms joint pain, muscle stiffness (rigidity), muscle weakness and night sweats including Lack of exercise, Exercise or physical activity, and Hypocalcemia.endinitis symptoms include muscle and tendon pain or stiffness close to a joint, and pain with movement.
Symmetric Encryption. Symmetric encryption (or pre-shared key encryption) uses a single key to both encrypt and decrypt data. Both the sender and the receiver need the same key to communicate. Symmetric key sizes are typically 128 or 256 bitsâthe larger the key size, the harder the key is to crack.
The operation of the keystream generator in A5/1, an LFSR-based stream cipher used to encrypt mobile phone conversations. A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream). In a stream cipher, each plaintext digit is encrypted one at a time with the corresponding digit of the keystream, to give a digit of the ciphertext stream. Since encryption of each digit is dependent on the current state of the cipher, it is also known as state cipher.