Before revision: Each threat is a violation of a desirable property for a system: Threat Desired property Spoofing Authenticity Tampering Integrity Repudiation Non-repudiability Information disclosure Confidentiality Denial of service Availability Elevation of privilege Authorization Notes on the threats Repudiation is unusual because it's a threat when viewed from a security perspective, and a desirable property of some privacy systems, for example, Goldberg's "Off the Record" messaging system.
After revision: Each threat is a violation of a desirable property for a system: Threat Desired property Threat Definition Spoofing Authenticity Pretending to be something or someone other than yourself Tampering Integrity Modifying something on disk, network, memory, or elsewhereClaiming that you didn't do something or were not responsible; can be honest or falseProviding information to someone not authorized to access itExhausting resources needed to provide serviceAllowing someone to do something they are not authorized to do Repudiation Non-repudiability Information disclosure Confidentiality Denial of service Availability Elevation of privilege Authorization Notes on the threats Repudiation is unusual because it's a threat when viewed from a security perspective, and a desirable property of some privacy systems, for example, Goldberg's "Off the Record" messaging system.