Unverified50% confidenceFactExact time
An open password corresponds to the "encryption dictionary" and "user password" in the PDF specification; the file content is genuinely encrypted, and without the password only garbled text can be seen.
1
Sources
50%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedSteganography differs from encryption in that encryption makes content unreadable, whereas steganography makes the very existence of content undetectable.77% similarUnverified同态加密可以在加密数据上直接进行计算，而无需先解密，计算结果同样是加密的，只有持有密钥的人才能解密76% similarUnverifiedThe security of a substitution cipher is built on keeping the mapping table secret; once the mapping table leaks, the ciphertext becomes immediately readable.76% similarUnverifiedRelic claims that data is sealed with encryption and can only be decoded by the user themselves.75% similar
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