APT 3.3.4 adds SHA3 support and tightens download verification

APT, the package manager for Debian and Ubuntu, has been updated to version 3.3.4 with support for SHA3-256 and SHA3-512 hashing, though SHA3 checksum generation stays disabled by default. The release also makes APT reject downloads when a required hash cannot be calculated and properly surfaces OpenSSL hashing failures.

• SHA3-256 and SHA3-512 support added but disabled by default
• Downloads are rejected when a required hash cannot be calculated
• OpenSSL hashing failures are now properly surfaced
• The update targets Debian unstable, not stable or Ubuntu