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Why BitLocker does not use RSA
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)Securely read encryption key from NVRAM of TPM 1.2Methods of cold boot attacks in the wildClarification of RSA Key Exchange (TLS 1.2) and AES for On-Going Message ExcahngeShould I really salt in a RSA/AES hybrid connection?Anniversary Update with Bitlocker Reboot without Encryption KeyIs it possible to extract secrets from a TPM without knowing the PIN?Security of TPM 1.2 for providing tamper-evidence against firmware modificationHow does full memory encryption in newer processes protect against DMA attacks?How does Bitlocker + TPM prevent me seeing the HDD contents with another OS?Is GPG's AES encryption that much stronger than its RSA headers?
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If I do not understand wrong from this post and Wikipedia page of the BitLocker and TPM, by default, BitLocker uses symmetric cryptography like AES. However, TPM is capable of performing RSA encryption.
Given that, the RSA key is stored in the TPM, why BitLocker does not use the asymmetric encryption (i.e., RSA)? By using such encryption technique, we might be able to defend against the cold boot attack or sniffing on LPC bus.
aes rsa tpm bitlocker cold-boot-attack
asked 3 hours ago
user3862410user3862410
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If I do not understand wrong from this post and Wikipedia page of the BitLocker and TPM, by default, BitLocker uses symmetric cryptography like AES. However, TPM is capable of performing RSA encryption.
Given that, the RSA key is stored in the TPM, why BitLocker does not use the asymmetric encryption (i.e., RSA)? By using such encryption technique, we might be able to defend against the cold boot attack or sniffing on LPC bus.
aes rsa tpm bitlocker cold-boot-attack
asked 3 hours ago
user3862410user3862410
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
If I do not understand wrong from this post and Wikipedia page of the BitLocker and TPM, by default, BitLocker uses symmetric cryptography like AES. However, TPM is capable of performing RSA encryption.
Given that, the RSA key is stored in the TPM, why BitLocker does not use the asymmetric encryption (i.e., RSA)? By using such encryption technique, we might be able to defend against the cold boot attack or sniffing on LPC bus.
aes rsa tpm bitlocker cold-boot-attack
asked 3 hours ago
user3862410user3862410
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
If I do not understand wrong from this post and Wikipedia page of the BitLocker and TPM, by default, BitLocker uses symmetric cryptography like AES. However, TPM is capable of performing RSA encryption.
Given that, the RSA key is stored in the TPM, why BitLocker does not use the asymmetric encryption (i.e., RSA)? By using such encryption technique, we might be able to defend against the cold boot attack or sniffing on LPC bus.
aes rsa tpm bitlocker cold-boot-attack
aes rsa tpm bitlocker cold-boot-attack
asked 3 hours ago
user3862410user3862410
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
user3862410user3862410
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
user3862410user3862410
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
user3862410user3862410
61
asked 3 hours ago
user3862410user3862410
61
61
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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user3862410 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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1 Answer
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Asymmetric encryption like RSA is limited in that you can only use it to encrypt data the size of the key. With a 2048 bit key, you can only encrypt 2048 bits of information. For this reason RSA is unsuitable for bulk encryption like disks - and even for small files like email messages.
This is why almost all uses of asymmetric encryption involve "hybrid encryption". RSA is used to encrypt the key for a symmetric algorithm like AES, and AES is used to encrypt the bulk data. PGP is an example of a hybrid encryption application.
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
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1 Answer
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1 Answer
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Asymmetric encryption like RSA is limited in that you can only use it to encrypt data the size of the key. With a 2048 bit key, you can only encrypt 2048 bits of information. For this reason RSA is unsuitable for bulk encryption like disks - and even for small files like email messages.
This is why almost all uses of asymmetric encryption involve "hybrid encryption". RSA is used to encrypt the key for a symmetric algorithm like AES, and AES is used to encrypt the bulk data. PGP is an example of a hybrid encryption application.
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
add a comment |
Asymmetric encryption like RSA is limited in that you can only use it to encrypt data the size of the key. With a 2048 bit key, you can only encrypt 2048 bits of information. For this reason RSA is unsuitable for bulk encryption like disks - and even for small files like email messages.
This is why almost all uses of asymmetric encryption involve "hybrid encryption". RSA is used to encrypt the key for a symmetric algorithm like AES, and AES is used to encrypt the bulk data. PGP is an example of a hybrid encryption application.
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
add a comment |
Asymmetric encryption like RSA is limited in that you can only use it to encrypt data the size of the key. With a 2048 bit key, you can only encrypt 2048 bits of information. For this reason RSA is unsuitable for bulk encryption like disks - and even for small files like email messages.
This is why almost all uses of asymmetric encryption involve "hybrid encryption". RSA is used to encrypt the key for a symmetric algorithm like AES, and AES is used to encrypt the bulk data. PGP is an example of a hybrid encryption application.
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
Asymmetric encryption like RSA is limited in that you can only use it to encrypt data the size of the key. With a 2048 bit key, you can only encrypt 2048 bits of information. For this reason RSA is unsuitable for bulk encryption like disks - and even for small files like email messages.
This is why almost all uses of asymmetric encryption involve "hybrid encryption". RSA is used to encrypt the key for a symmetric algorithm like AES, and AES is used to encrypt the bulk data. PGP is an example of a hybrid encryption application.
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
answered 2 hours ago
gowenfawrgowenfawr
54.9k11115162
54.9k11115162
add a comment |
add a comment |
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