Question

analyzing word meaning. a variation on the trojan horse is a brand - new piece of encryption software that seems secure, but which actually contains a backdoor, something that allows its designers to decrypt everybodys messages. - the code book, simon singh. what part of speech is secure, as used in this excerpt? adjective. what word is secure describing? software. what does secure mean, as used in this excerpt? safe from attack; to make safe from attack; x safety

Explanation:

The word "secure" in the context "encryption software that seems secure" is an adjective modifying the noun "software". It means the software appears to be safe from attack.

Answer:

What part of speech is secure, as used in this excerpt? - adjective
What word is secure describing? - software
What does secure mean, as used in this excerpt? - safe from attack