méiyǒu guānxìle. Nǐ kěyǐ zuò hěnduō jìsuàn, ránhòu huí gěi yuánbǎn de rén, suǒyǐ tā/tā huì xiāochú zàoyīn, nà nǐ zài zuò hěnduō jìsuànle. Yòng zhège xiǎngfǎ kěyǐ dédào”homomorphic encryption”, dànshì tā hái zài hěn màn. Slide 64: The idea is based on the following observation: you can send something that you interpret as zero but other people don’t. For example, both midnight and noon are zero on a clock. If you didn’t know how many hours a clock had, though, then you wouldn't know that 0, 12, and 24 were all the same thing. So you send the data in one way, but interpret it differently yourself. This is the basis of Gentry’s idea. jiěshì Wǔyè Zhège xiǎngfǎ shǐyòng yǐxià kāishǐ diǎn: Nǐ kěyǐ fāsòng biérén nǐ wèi děngyúlíng de shùjù, dànshì rúguǒ tāmen yòng tāmen yòng zìjǐ de jiěshì, nà tāmen bù zhīdào tā děngyúlíng. Lìrú: hé zhōngwǔ zài shízhōng shàng doū shì língdiǎn, dànshì rúguǒ bié de rénlèi bù zhīdào nǐ de shízhōng yǒu shí'èr gè xiǎoshí, nà tāmen yě bù zhīdào líng, shí'èr, hé èrshísì dōu shì yīyàng shíjiānle. Suǒyǐ wǒmen fāsòng shùjù jǐ rén yīgè biǎoshì, dànshì wǒmen zìjǐ duì shùjù de jiěshì shì bùtóng de. Zhè jiùshì Gentry xiǎngfǎ de jīchǔ. Slide 65: There are now LOTS of zeros, so we can pick a different way to write zero each time we send a message. Someone would have to figure out that these are all zero to recognize it. Of course, this pattern is too simple (like “Caesar Cipher”), so people in the middle can recognize it. xuǎn zhái dé dǒng rènshí móshì nándù
méiyǒu guānxìle. Nǐ kěyǐ zuò hěnduō jìsuàn, ránhòu huí gěi yuánbǎn de rén, suǒyǐ tā/tā huì xiāochú zàoyīn, nà nǐ zài zuò hěnduō jìsuànle. Yòng zhège xiǎngfǎ kěyǐ dédào”homomorphic encryption”, dànshì tā hái zài hěn màn. Slide 64: The idea is based on the following observation: you can send something that you interpret as zero but other people don’t. For example, both midnight and noon are zero on a clock. If you didn’t know how many hours a clock had, though, then you wouldn't know that 0, 12, and 24 were all the same thing. So you send the data in one way, but interpret it differently yourself. This is the basis of Gentry’s idea. Zhège xiǎngfǎ shǐyòng yǐxià kāishǐ diǎn: Nǐ kěyǐ fāsòng biérén nǐ jiěshì wèi děngyúlíng de shùjù, dànshì rúguǒ tāmen yòng tāmen yòng zìjǐ de jiěshì, nà tāmen bù zhīdào tā děngyúlíng. Lìrú: Wǔyè hé zhōngwǔ zài shízhōng shàng doū shì língdiǎn, dànshì rúguǒ bié de rénlèi bù zhīdào nǐ de shízhōng yǒu shí'èr gè xiǎoshí, nà tāmen yě bù zhīdào líng, shí'èr, hé èrshísì dōu shì yīyàng shíjiānle. Suǒyǐ wǒmen fāsòng shùjù jǐ rén yīgè biǎoshì, dànshì wǒmen zìjǐ duì shùjù de jiěshì shì bùtóng de. Zhè jiùshì Gentry xiǎngfǎ de jīchǔ. Slide 65: There are now LOTS of zeros, so we can pick a different way to write zero each time we send a message. Someone would have to figure out that these are all zero to recognize it. Of course, this pattern is too simple (like “Caesar Cipher”), so people in the middle can recognize it. dé xuǎn zhái dǒng rènshí móshì nándù