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.
Using Symmetric Ciphers for MACs â¢ can use any block cipher chaining mode and use final block as a MAC â¢ Data Authentication Algorithm (DAA) is a widely used MAC based on DES-CBC â using IV=0 and zero-pad of final block â encrypt message using DES in CBC mode â and send just the final block as the MAC â¢ or the leftmost M bits (16â¤Mâ¤64) of final block .