Tony wants to integrate a 128-bit symmetric block cipher with key sizes of 128,192, or 256 bits into a software program, which involves 32 rounds of computational operations that include…

TEA (Tiny Encryption Algorithm) operates on 64-bit blocks using a Feistel network structure with data-dependent operations and does not use the S-box architecture with 4-bit entries and exits described.

CAST-128 uses a 64-bit block size and supports key sizes from 40 to 128 bits with either 12 or 16 rounds, which does not match the 128-bit block size or 32-round specification.

RC5 uses data-dependent rotations and a Feistel-like structure with variable block sizes and round counts, and does not employ 8 S-boxes with 4-bit entries and exits as described.

Serpent is a symmetric block cipher operating on 128-bit blocks split into four 32-bit words, supporting key sizes of 128, 192, or 256 bits. It performs exactly 32 rounds of substitution-permutation network operations using 8 distinct S-boxes, each with a 4-bit input and 4-bit output - precisely matching every technical parameter described. Serpent was an AES finalist known for its conservative, high-round-count design that prioritizes security margin over speed.