Question: What are the specified encryption algorithm, key size, and mode for Transparent end-to-end Packet-switched Streaming Service (PSS) as per 3GPP standards?
Option 1: DES (Data Encryption Standard) with 256 bit key in ECB (Electronic Codebook) mode
Option 2: AES (Advanced Encryption Standard) with 64 bit key in CBC (Cipher Block Chaining) mode
Option 3: RSA (Rivest-Shamir-Adleman) with 1024 bit key in PKCS#1 mode
Option 4: AES (Advanced Encryption Standard) with 128 bit key in Counter (CTR) mode
Explanation: The correct answer is based on the standard's requirement for secure and efficient encryption. AES provides strong security features, with a 128-bit key size offering a balance between security and performance. Counter (CTR) mode is preferred for streaming services like PSS due to its support for parallel processing and minimal impact from packet loss or reordering, ensuring seamless streaming experiences.