UUID
A 128-bit identifier generated by an algorithm that does not depend on a central registration authority and is theoretically unique worldwide, commonly used for internal system identity identifiers.
Core Facts
An idempotency key is a globally unique key generated by the client for each operation (usually a UUID) and sent to the external service with the request; the server checks whether the key already exists before processing, and if it does, returns the previous result without executing the actual action again.
Idempotency means that the same operation should yield the same final result regardless of whether it is executed once or multiple times; a common implementation is to generate a globally unique request ID (such as a UUID) for each request for server-side deduplication.
Timeline (last 90 days)
For developers, the randomness, access control and discoverability of shareable links should be part of security design; generating a UUID is not enough to prevent enumeration—rate limiting, access logs and index protection are also needed.
The randomness of UUIDs (such as UUIDv4) is sufficient to prevent brute-force guessing, but if the generation pattern has regularities or the links are publicly indexed, they can still be collected and enumerated.
The drawbacks of UUIDs include poor readability, larger storage footprint (typically 16 bytes), and worse insert performance than auto-increment IDs when used as a clustered index.
A UUID is a 128-bit identifier generated by an algorithm, with a theoretically extremely low probability of collision worldwide.
The primary key of the user table should be a system-generated internal ID unrelated to any external identifier (such as a UUID).
In practice, it is recommended to generate a UUID when the client initializes and reuse it throughout the session's lifecycle.
Without an installation, documents cannot use a path as identity and must instead use a stable identifier under the account (such as a UUID) plus metadata.
The core of IDOR remediation is to perform a server-side authorization check before every object access, combined with the use of unpredictable identifiers (such as UUIDs) as defense in depth.
An idempotency key is a globally unique key generated by the client for each operation (usually a UUID) and sent to the external service with the request; the server checks whether the key already exists before processing, and if it does, returns the previous result without executing the actual action again.
A UUID is a fixed 36-character, hyphenated hexadecimal format.
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All Facts (14)
An idempotency key is a globally unique key generated by the client for each operation (usually a UUID) and sent to the external service with the request; the server checks whether the key already exists before processing, and if it does, returns the previous result without executing the actual action again.
65%VerifiedIdempotency means that the same operation should yield the same final result regardless of whether it is executed once or multiple times; a common implementation is to generate a globally unique request ID (such as a UUID) for each request for server-side deduplication.
65%UnverifiedFor developers, the randomness, access control and discoverability of shareable links should be part of security design; generating a UUID is not enough to prevent enumeration—rate limiting, access logs and index protection are also needed.
50%UnverifiedThe randomness of UUIDs (such as UUIDv4) is sufficient to prevent brute-force guessing, but if the generation pattern has regularities or the links are publicly indexed, they can still be collected and enumerated.
50%UnverifiedThe primary key of the user table should be a system-generated internal ID unrelated to any external identifier (such as a UUID).
50%UnverifiedThe drawbacks of UUIDs include poor readability, larger storage footprint (typically 16 bytes), and worse insert performance than auto-increment IDs when used as a clustered index.
50%UnverifiedA UUID is a 128-bit identifier generated by an algorithm, with a theoretically extremely low probability of collision worldwide.
50%UnverifiedIn practice, it is recommended to generate a UUID when the client initializes and reuse it throughout the session's lifecycle.
50%UnverifiedWithout an installation, documents cannot use a path as identity and must instead use a stable identifier under the account (such as a UUID) plus metadata.
50%UnverifiedThe core of IDOR remediation is to perform a server-side authorization check before every object access, combined with the use of unpredictable identifiers (such as UUIDs) as defense in depth.
50%UnverifiedA UUID is a fixed 36-character, hyphenated hexadecimal format.
50%UnverifiedThe generation mechanism for Tool IDs is typically based on UUID or similar random strings, with lengths generally ranging between 32–36 characters
50%UnverifiedThe string form of a UUID occupies 36 bytes, which is larger than BIGINT's 8 bytes, and random inserts cause frequent B+ tree page splits, negatively impacting write performance.
50%UnverifiedBINARY(16) can be used to store the binary form of a UUID, or an ordered UUID (such as UUIDv7) can be adopted to improve locality.
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